,illustration3 ,immanuel ,kant 99,,the ,,philosophy ,,of ,,immanuel ,,kant99 ,,by ,a4 ,d4 ,,lindsay1 ,m4,a4 ,,fellow ,,and ,,tutor ,,of ,,balliol ,,college1 ,,oxford ,,london3 ,t4 ,c4 ,e4 ,c4 ,,jack1 ,,ltd4 #ce ,,paternoster ,,row1 ,e4,c41 ,,edinburgh ,,new ,,york3 ,,dodge ,,publishing ,,co4 99,,foreword99 ,there is a story that ,schopenhauer used to begin his lectures on ,kant by saying3 ,let no one tell you what is contained in the ,critique of ,pure ,reason4 ,the writer of this little book hopes that no one will imagine that he has disregarded this warning4 ,there are no short-cuts to the understanding of a great philosopher1 and the only way to appreciate the greatness of a philosophic system is to study the philosopher's own writings4 ,all that the writer of a book like this can hope to do is to persuade others to undertake that study by interesting them in the problems with which it deals1 and by offering a few suggestions which may help to an understanding of it4 ,i have said nothing about the numerous other works which ,kant wrote4 ,for the three ,critiques contain his system1 and the understanding of that is all-important4 99,,contents99 ,,chap4 ,i4 ,,the ,,idea ,,of ,,criticism ,,ii4 ,,kant',s ,,statement ,,of ,,the ,,problem4 ,,synthetic ,a ,,priori ,,judgments ,,iii4 ,,kant',s ,,idealism4 ,,time ,,and ,,space ,,iv4 ,,the ,,categories ,,and ,,the ,,principles ,,of ,,pure ,,understanding ,v4 ,,the ,,antinomies ,,and ,,criticism ,,of ,,the ,,proofs ,,of ,,the ,,existence ,,of ,,god ,,vi4 ,,kant',s ,,moral ,,theory ,,vii4 ,,the ,,critique ,,of ,,judgment ,,bibliography 99,,the ,,philosophy ,,of ,,kant99 99,,chapter ,i99 99,,the ,,idea ,,of ,,criticism99 ,it is a difficult matter1 says ,heine1 to write the life history of ,immanuel ,kant1 for he had neither life nor history4 ,he lived a mechanically ordered1 abstract1 old bachelor kind of existence in a quiet1 retired alley in ,koenigsberg1 an old town in the north-east corner of ,germany4 ,the times he lived in were stirring enough4 ,he was born in #agbd1 and died in #ahjd4 ,he lived through the ,seven ,years' ,war that first made ,germany a nation1 he followed with sympathy the ,united ,states ,war of ,independence1 he saw the ,french ,revolution and the beginning of the career of ,napoleon4 ,yet in all his long life he never moved out of the province in which he was born1 and nothing was allowed to interrupt the steady course of his lecturing1 studying1 and writing4 ,getting up1 continues ,heine1 drinking coffee1 lecturing1 eating1 going for a walk1 everything had its fixed time2 and the neighbours knew that it must be exactly half-past four when ,immanuel ,kant1 in his gray frock-coat1 with his ,spanish cane in his hand1 stepped from his door and walked towards the little lime-tree avenue1 which is called after him the ,philosopher's ,walk4 ,strange contrast1 reflects ,heine1 between the man's outward life and his destructive1 world-smashing thoughts4 ,as the political history of the eighteenth century came to an end when the ,french ,revolution spilled over the borders of ,france and drove ,napoleon up and down ,europe1 breaking up the old political systems and inaugurating modern ,europe1 so its opposing currents of thought were gathered together in the mind of a weak-chested1 half-invalid little man in ,koenigsberg1 and from their meeting a new era in philosophy began4 ,there are some philosophers to whom truth seems to come almost unsought1 as an immediate authoritative vision4 ,kant was not one of these4 ,his greatest work1 the ,critique of ,pure ,reason1 was conceived when he was forty-eight1 and published in #agha1 when he was fifty-seven4 ,it was the outcome of half a lifetime's patient study and thought4 ,heine says of him3 ,he was the perfect type of the small shopkeeper4 ,nature had meant him to weigh coffee and sugar1 but fate willed that he should weigh other things and put a ,god on his scales1 and his weighing was exact4 ,the sneer is unjust1 but there is something in the simile2 for ,kant's philosophy was a kind of taking stock1 a survey of the great movement of thought from the time when the ,renaissance and the ,reformation made thought free1 an attempt to estimate the achievements of the new sciences1 to deal with their conflicting claims and ideals and say what it all came to4 ,in ,kant modern science1 which began with ,descartes and ,galileo1 first became conscious of itself4 ,this taking stock ,kant called ,criticism4 ,his great books are all called ,critiques--the ,critique of ,pure ,reason1 the ,critique of ,practical ,reason1 the ,critique of ,judgment4 ,he called his philosophy the ,critical ,philosophy or ,critical ,idealism4 ,essential to an understanding of ,kant is an understanding of what he meant by criticism1 and why he opposes it to dogmatism and scepticism2 for the necessity and possibility of such a criticism was his great philosophical discovery4 ,we have called ,kant's work a survey of the achievements of the thought of his times1 but it was very much more than that1 and has a much more universal significance than could belong to any history of the thought of one epoch4 ,for these achievements of thought1 though great1 were conflicting and partial4 ,they contrasted with failure and barrenness in other directions1 and they seemed to be due to different methods4 ,this success of thought in one direction and its failure in another1 and this uncertainty about the true method of science1 were problems which at once presented themselves to an impartial observer1 and ,kant held that they could be answered only by taking stock of actual attainments1 and by criticism of the powers and range of human thought in general4 ,the problem that presented itself to him will be understood if we look for a moment at the history of thought in the seventeenth and eighteenth centuries4 ,one thing that ,kant noted in it was the steady and sure progress of physics4 ,with the experiments of ,galileo and ,torricelli1 he says in the preface to the second edition of the first ,critique1 a new light flashed on all students of nature4 ,the continued success of physics meant the successful application of mathematics to the concrete world1 and along with it a remarkable development of mathematics itself4 ,this sudden success inspired men to feel that they had discovered a way of explaining the universe2 they contrasted the fertility of their new methods with the barrenness of scholastic speculation in morals and theology2 they felt confident that all that was wanted to the attainment of certain knowledge in all spheres of human interest was the extension of these methods4 ,if men would only set to work the right way1 they were sure that all difficulties would be overcome2 and1 by reflection upon their own success1 they hoped to explain what the right way was4 ,unfortunately this was not easy1 for the advance from pure mathematics to physics1 from a study of the nature of pure mathematical conceptions to an inquiry into the laws of falling bodies1 implied a change whose nature was not clear to the men who had themselves made the advance4 ,a conflict arose between those who thought more of the fact that knowledge1 to be certain1 must be capable of mathematical expression1 and those who thought more of the basis of experiment and observation on which the new sciences depended1 who remembered that these sciences began when ,galileo1 instead of thinking in the abstract how bodies ought to fall1 dropped bodies of different weights from the top of the leaning tower of ,pisa and observed what actually happened4 ,descartes was the great representative of the first school4 ,he began by insisting on the difference between mathematical truth which could be1 as he said1 clearly and distinctly conceived1 and ordinary opinion about things which was full of guesswork and imagination4 ,scientific knowledge was possible1 he thought1 only by apprehending the real or primary qualities of things which were mathematical1 in contradistinction to their secondary qualities--their colour1 smell1 c4--which were less real4 ,thence he came to think that the real world was mathematical in nature1 like a huge1 intricate geometrical figure4 ,the elements of mere fact1 in our present knowledge1 its dependence on observation and experiment1 he thought of as temporary defects which the progress of science would remove4 ,what we ordinarily call perception1 indeed1 in the sense of awareness of things in time and space1 was described by ,descartes' successors as confused thinking4 ,our knowledge of the world would1 it was hoped1 become a vast mathematical system1 all the detail and complexity of which would be rigorously deducible from a few central truths4 ,this general way of thinking was called ,rationalism4 ,kant ordinarily calls it ,dogmatism4 ,it was attacked by other scientists for its view of the nature of space and time4 ,no one who reflects at all can fail to distinguish a difference between the way in which we see the truth of a geometrical proposition--that1 e4g41 the three angles of a triangle are equal to two right angles--and the way in which we judge that such and such a figure drawn on a board is a triangle1 or make judgments about the way in which things are actually arranged in space or succeed in time4 ,judgments of the latter kind involve words like here and there1 now and then1 words which are all a kind of pointing4 ,it seems impossible from considering the nature of a triangle to deduce why any existing thing should be called triangular1 and all statements about the position of things in space and time seem to be derived not from a consideration of the general nature of space and time1 but from observation4 ,now the science which had made perhaps the most striking progress in the time we are speaking of1 physical astronomy1 involved any number of statements about the position of bodies in space4 ,the ,rationalist school admitted this1 but held that that was due to the fact that science was not sufficiently thought out4 ,in time1 they hoped1 all statements about position in space would disappear4 ,to think of things in spatial order was to think confusedly4 ,newton1 on the other hand1 held that space could not be explained away1 that astronomy implied an absolute space in which things existed1 that the spatial relations of things could not be explained by the nature of the things themselves1 but only by a reference to absolute space in which they all were4 ,this meant that observation or perception was something of which you could not hope and should not wish to get rid1 and that an ideal of knowledge in which all applied mathematics should have been transmuted into pure mathematics was a vain one4 ,astronomy implied both mere observation and apprehension of necessary relations4 ,here was a science which seemed to employ both methods together4 ,galileo1 in fact could not have made his discovery without observation but men had observed bodies falling for ages without discovering the laws of motion4 ,further1 the laws of motion1 once discovered1 made men in some degree independent of observation1 made them able to say of actual concrete things not only what had happened1 but what must happen4 ,such difficulties as these arose from reflection on the aims and methods of the mathematical sciences1 but there was much genuinely scientific inquiry in the seventeenth and eighteenth centuries1 which showed no signs of taking mathematical form2 chemistry and biology1 for example1 were still almost entirely empirical4 ,furthermore1 thinkers were not concerned with science alone4 ,these centuries saw a great revival of interest in speculation on human affairs1 history1 politics1 morals and theology4 ,england1 which was the home of free discussion on questions of politics and morals1 and where1 more than in most other countries1 there was free discussion on theology1 became also the home of empiricism4 ,the empirical movement1 indeed1 drew much of its impetus from a reaction against ,hobbes1 the only great ,english thinker who unhesitatingly applied the mechanical and deterministic assumptions of the new sciences to morals and politics1 and arrived by this uncompromising method at results so obviously repellent that no man of any sense could accept them1 and so consistently presented that they could not be refuted save by a refutation of the assumptions upon which they were founded4 ,such a refutation was1 in fact1 undertaken by ,locke1 the first great representative of the empirical school4 ,he was interested alike in the more obviously empirical sciences of chemistry and biology1 and in politics4 ,he was not a very consistent or systematic thinker1 but he had other gifts perhaps as valuable4 ,he was a man of great common sense and breadth of view1 and was able thereby to take a conspectus of the general situation in the various spheres of inquiry1 to notice the obvious differences in our knowledge of mathematics1 of chemical and biological fact1 and of theology1 and to see that these constituted a problem4 ,we find in him the first statement of the necessity of philosophical criticism4 ,it is contained in his account of the origin of the ,essay concerning ,human ,understanding4 ,were it fit to trouble thee with the history of this ,essay1 ,i should tell thee that five or six friends1 meeting at my chamber1 and discoursing on a subject very remote from this 7they were discussing the principles of morality and revealed religion71 found themselves quickly at a stand1 by the difficulties that rose on every side4 ,after we had awhile puzzled ourselves1 without coming any nearer a resolution of those doubts which perplexed us1 it came into my thoughts that we took a wrong course2 and that1 before we set ourselves upon inquiries of that nature1 it was necessary to examine our own abilities1 and see what objects our understandings were1 or were not1 fitted to deal with4 ,we have here the same general starting point of inquiry as we shall afterwards find in ,kant4 ,there are certain1 obstinate puzzles which we meet with in discussion which can only be solved by going back and inquiring into the nature of knowledge and the powers of our minds4 ,unfortunately1 as ,kant points out1 ,locke went the wrong way about his task4 ,he describes it as a plain historical inquiry4 ,he thought that he had only to look into his mind and see what was in it1 as he might open a door and look into a room4 ,the result is that he thinks of all knowledge as consisting simply in looking at what is present to the mind4 ,we can know1 therefore1 whatever can be present to the mind1 and the limitations of knowledge are discovered by asking what can be so present to the mind4 ,the conclusions to which he comes as to different spheres of human inquiry are roughly these3 ,we can have knowledge of mathematics because there we are concerned only with ideas present to the mind1 and with noting their agreement and disagreement4 ,we can have no knowledge of such questions as the immortality of the soul1 or the nature of spirits1 for they are beyond our observation4 ,as regards existing things1 we can have knowledge of them1 in so far as they are present to our minds1 and no further4 ,the meaning of present to the mind was never clearly analysed by ,locke2 but he meant1 for example1 that we can observe that an object which is yellow1 and which we call gold1 is also heavy1 and can be dissolved by ,aqua ,regia1 but we cannot say why that is so1 and we ought not1 on ,locke's principles1 to have any ground for supposing that these qualities will go on co-existing4 ,the element of truth in ,locke's position is this4 ,when we are examining concrete things like pieces of gold or any chemical substance1 we find in them a number of varying qualities whose connection we cannot understand4 ,we do not know why a metal of a certain specific gravity should also be yellow2 we can only note the fact4 ,hence in chemistry our method must be quite different from the method of mathematics4 ,in mathematics we start from the definition1 and we can understand the connection of the properties of a geometrical figure1 and see that they all follow necessarily from the definition4 ,but in sciences like chemistry a definition does not take us any further2 we can only find out the properties of a substance by observation and experiment4 ,locke explains this difference by saying that in the former case we are only concerned with agreement among our own ideas1 in the second place we are concerned somehow with things outside us4 ,this explanation will not stand4 ,it is not true that mathematics is simply analysis of an arbitrary definition1 as ,locke seems to suggest4 ,it involves construction1 or1 as ,kant calls it1 synthesis4 ,it is a process of discovering new truths4 ,secondly1 our statements about concrete objects are not statements of qualities we see co-existing at the moment4 ,they are statements about all gold or all men2 in other words1 they are universal1 and ,locke found it impossible to explain the universality of such propositions--what we mean1 e4g4 when we talk about the nature of gold or of man1 not of this gold or this man that ,i see before me4 ,lastly1 this distinction of mathematics and the empirical sciences by a distinction of spheres does not allow1 as we saw1 for a science like astronomy1 which builds on mathematics and yet applies to the concrete world4 ,these difficulties were seen more clearly by ,hume1 at once the greatest and the most thorough-going of empiricists4 ,he cut the knot in regard to mathematics by asserting that geometry1 just because it has clearly an application to the existing world1 had no more certainty than any other empirical inquiry1 while arithmetic and algebra1 he agreed1 were certain1 but confined their application to the sphere of our own ideas4 ,both positions are almost obviously inconsistent with the facts4 ,in considering the nature of our judgments about concrete existences he raised a more profound problem4 ,all such judgments1 as he said1 imply the principle of causation1 or of what is called1 in modern times1 the principle of the uniformity of nature4 ,that principle we take with us in our investigation of the existing world4 ,yet1 as ,hume saw1 we do not observe causes2 we only observe succession and change4 ,we seem1 therefore1 to put into the world we see a necessity and uniformity which the observed facts do not warrant4 ,how is this to be explained8 ,hume's answer is ingenious4 ,the principle of causation cannot be rationally justified1 and the necessary connection we predicate of changes in the outside world is not in the things2 it is only a feeling in ourselves1 and is the result of custom4 ,after seeing the same succession several times1 we come somehow to feel differently about it1 and that feeling of difference we express by saying that we have before us an instance not of simple succession1 but of cause and effect4 ,this is not the place to discuss the difficulties of ,hume's position2 it is enough to notice how entirely passive it makes the mind1 and how alien such an explanation is from the spirit of inquiry and discovery4 ,if cause is simply the effect of custom on the mind1 then the facts either produce that effect or they do not4 ,in neither case is there anything to find out4 ,but the scientist1 in investigating causes1 however strongly he may hold that he has to observe the facts1 knows also that he has a problem to solve1 that he has to discover the right way to go about it1 must adopt some principle in dealing with the facts4 ,pure passivity will help him little4 ,hume's account of causation1 then1 is really a denial of even empirical science1 and yet it helped to make clear an important truth2 for1 although we do not get the principle of causation from experience1 we have to go to experience to discover causal laws4 ,we do not discover causation by analysing a cause and seeing that it is such that1 from its nature1 it must produce a certain effect4 ,all knowledge of causation goes back to observed succession1 though all cases of observed and even repeated succession are not cases of causation4 ,hume1 therefore1 was right in saying that where there could be no observed succession there could be no knowledge of causation4 ,both the rationalistic and the empirical explanations of science had failed1 the one because it could find no room for observation of facts1 the other because it could find no room for principles governing that observation2 and we shall see that ,kant started with a consciousness of this double failure4 ,he saw that ,hume's criticism of causation raised problems for which the rationalist had no answer1 and yet that the position reached by ,hume was incompatible with the existence of science4 ,the same failure of both rationalism and empiricism had become evident in another sphere--that of morals and religion4 ,the relation of philosophy to science is always twofold4 ,philosophy is partly concerned with analysing and reflecting on the methods of the different sciences1 partly with seeking to adjust the rival and conflicting claims of the two great departments of man's life--science and religion4 ,it might seem1 at first sight1 as though in morals and religion rationalism were the only possible method to be approved by philosophy1 for1 inasmuch as morals are concerned with what ought to be1 not with what is1 they cannot depend on observation1 but must be deduced from some principle above experience2 nor are objects of religion1 ,god and the soul1 objects of observation4 ,no man can by searching find out ,god4 ,it was natural1 therefore1 that both on the ,continent and in ,england morality and religion began by being rationalistic4 ,descartes believed that his mathematical method could be applied with success to demonstrate the truths of religion1 while ,locke includes morality along with mathematics among the a priori and certain sciences4 ,but the history of eighteenth century controversy showed that1 in spite of rationalist methods1 neither morality nor religion could attain that certainty and general agreement which marked the mathematical sciences4 ,spinoza1 applying the same method as ,descartes1 but with more consistency1 arrived at a conception of ,god which most of his contemporaries regarded as horrid atheism1 and the general result of rational theology is well described by one of ,kant's correspondents when he says that the more proofs of the existence of ,god he learnt1 the more his doubts increased4 ,in ,england the attempts made to found morality upon rationalist principles produced systems too barren to withstand the attack of empiricism fortified by the growing interest in history and anthropology4 ,the ,deist movement1 an attempt to free religion from the incrustations of faith and deduce it from pure reason1 showed that a religion founded on pure reason contained nothing worth believing4 ,in ,hume we have the final discrediting of reason in these spheres4 ,he shows ingeniously that the good ,berkeley's argument for the existence of ,god could be turned round to disprove the existence of the soul1 and he concluded that religion was a sphere with which reason had no concern4 ,in the sphere of morals the distinction between what ought to be and what is1 the distinction on which rationalistic morals are based1 had been discredited by a reduction of all conduct to ,utilitarianism1 a search for pleasure and a flight from pain mediated by sympathy4 ,the consequences are described by ,kant in his preface to the ,critique of ,pure ,reason3 ,at present1 after everything has been tried1 so they say1 and tried in vain1 there reign in philosophy weariness and complete indifferentism1 the mother of chaos and night in all sciences1 though he hopefully continues1 but at the same time the source1 or at least the prelude1 of their near reform and of a new light1 after an ill-applied study has rendered them dark1 confused1 and useless4 ,the earlier of the modern thinkers--,descartes among the rationalists1 and ,bacon among the empiricists--are full of hope4 ,they have confidence in the human spirit4 ,but increased reflection seemed only to bring distrust with it4 ,the history of rationalism in theology showed that1 in such matters1 reason could prove absolutely opposing positions4 ,most men were ready to accept ,hume's dictum that any one who follows his reason must be a fool and take refuge in an indifferentism which accepts whatever happens to be there4 ,the remedy for this state of affairs1 ,kant finds1 is the critical method2 for disbelief in reason is the reaction from overconfidence in it4 ,men had thought that reason could prove everything4 ,because these hopes had been frustrated1 they now thought that it could prove nothing4 ,philosophy1 he was convinced1 would oscillate between overweening confidence and unwarranted distrust in itself until it had criticised human reason and discovered what it could do and what it could not4 ,this is the task he set before himself4 ,as the failure of eighteenth century philosophy1 which had led to distrust of all philosophy1 had been twofold--failure to give an intelligible explanation of the processes of scientific thought1 and failure to find any standard by which to mediate between the conflicting claims of science and religion--the task of the critical philosophy is twofold4 ,it attempts to explain and to justify the methods and assumptions of the sciences1 and to find some solution of the conflict between theories of the world which seem to be based upon these methods and the assumptions and claims of morality and religion4 99,,chapter ,,ii99 99,,kant',s ,,statement ,,of ,,the ,,problem4 ,,synthetic ,a ,,priori ,,judgments99 ,in the preface to the second edition of the ,critique of ,pure ,reason ,kant finds the necessity of criticism in the contrast between certain rational sciences and metaphysics4 ,mathematics and physics1 he observes1 are obviously certain sciences4 ,they are not empirical1 they make steady progress1 the results they have reached are secure and unanimously accepted1 and have a certainty which no mere empirical investigation could attain4 ,metaphysics1 on the other hand1 though as ancient an inquiry1 seems incapable of any settled results4 ,its history is a record1 not of steady progress1 but of bewildering marches and countermarches4 ,the confident conclusions of one philosopher are as confidently denied by another1 and the endless indecisive conflict produces in the minds of most men the conviction that in philosophy one doctrine is as good as another1 and therefore none are worth very much4 ,in the sphere where reason might be expected to be most at home1 reason is impotent2 yet the achievements of reason in those other spheres of the a priori sciences should preserve us from any general scepticism of the powers of reason4 ,the task of criticism will be to examine the part played by reason in science1 and to ask how far its failure in metaphysics is due to mistakes in method1 and how far to the different nature of the objects of the a priori sciences and of metaphysics4 ,kant points out that it was some time before either mathematics or physics followed the secure path of a science4 ,the contrast between the haphazard and empirical observations of the ,babylonians or ,egyptians and the science of the ,greeks was due to the discovery of a new method4 ,the discovery by ,galileo and ,torricelli of modern physics came about by a similar revolution in method4 ,the ,critique1 therefore1 is to be a treatise on method4 ,it will examine the method of reason in the sciences1 and ask what conclusions can be drawn as to the proper method of metaphysics4 ,in the ,prolegomena1 a work in which he summarises the results of the first ,critique1 ,kant describes the ,critique as an answer to three questions3 ,how is mathematics possible8 ,how is pure science of nature or physics possible8 and1 ,how is metaphysics possible8 ,something of the nature of his answer to the third1 and for him the most important1 question1 may be gathered from the fact that he explains that the third question should not be put in the form1 ,how is metaphysics as a science possible8 ,that question can only be answered by saying that it is not possible4 ,but it is still allowable and necessary to ask1 ,how is metaphysics possible as a natural disposition of the mind8 ,for the main result of his inquiries into the place of reason in the sciences is to show that reason is successful in the sciences only because of the presence of certain conditions which are wanting in metaphysics4 ,at first sight we might think it natural that the objects of metaphysics which ,kant enumerates as ,god1 ,freedom1 and ,immortality should be understood by reason1 and find it more difficult to explain how reason should apply to the world of ordinary experience4 ,the knowledge of everyday things is thought of as empirical1 a matter of observation2 while we are inclined to think that1 if there is rational knowledge1 it is knowledge of something else1 of the mere agreement or disagreement of ideas 7as ,hume thought71 or of the essences of things1 known independently and apart from perception1 as ,plato thought4 ,kant argues that the combination of a priori reasoning and empirical observation1 which earlier thinkers had found so puzzling in the exact sciences1 exhibits the only possible use of reason1 that reason1 divorced from and with no reference to the world of experience1 is barren1 and that consequently metaphysics1 if that be taken to mean a rational knowledge of objects which are outside of our experience1 does not exist4 ,we are left with metaphysics as a natural disposition2 for ,kant holds that the questions which metaphysics seeks to answer arise from the nature of reason and its relation to experience1 though their answer is to be sought not in knowledge but in action4 ,this last point must be elucidated later4 ,in the meantime we must see how this inquiry into the nature of reason crystalises itself into a seemingly abstract and trivial question3 ,how are synthetic a priori judgments possible8 ,it is baffling at first to find an inquiry of the scope we have indicated suddenly take such a narrow form1 but a little consideration will show the importance of the question4 ,knowledge may be regarded as either analysis or synthesis1 as a puzzling out or unravelling of what we somehow know already1 or as a putting together of what had previously been known or observed separately4 ,the rationalist school1 whom we described in the last chapter1 were inclined to regard all knowledge as analytical4 ,they thought of progress in knowledge as an advance from obscure to clear apprehension1 and as a thinking out or making clear of something which had always been known somehow4 ,mathematics1 the typical form of knowledge for the rationalists1 had been thought of as the analysis of what was implied or given in the definitions4 ,the conception of analytic a priori knowledge was thus familiar and simple4 ,on the other hand1 the empiricists had thought of knowledge as primarily synthesis--or1 as they called it1 association--a connecting together of ideas in their nature separate4 ,knowledge of a thing was thought of as the observing together of several ideas4 ,judgments about objects were regarded as judgments about the co-existence of separate ideas1 ideas which were not thought of as being bound by any logical necessity4 ,we do not understand why a substance with the specific gravity of gold should be yellow2 we only observe the co-existence of certain qualities4 ,the judgment1 then1 gold is yellow1 is synthetic2 it is an assertion of the co-existence of separate qualities4 ,it is also empirical2 it does not express a reasoned insight into the necessary connection of gold and yellow4 ,it seems rather a record of observation4 ,synthetic knowledge1 then1 was thought of as in its nature empirical and a posteriori4 ,hume1 who thought of all knowledge of the world in experience as synthetic1 denied to such knowledge any necessity or certainty4 ,hume1 however1 had noticed that the principle of causation1 the judgment that every event has a cause1 is both a priori and synthetic4 ,it is not1 he held1 derived from experience2 rather it is a principle which guides our investigation of experience4 ,it is not got from analysis of the notion of causation1 nor is it simply concerned with the agreement or disagreement of our ideas4 ,it asserts the necessary connection of two perfectly separate existing things4 ,hume himself1 as we saw1 tried to explain away these uncomfortable facts4 ,he was too wedded to his belief that all knowledge was derived from passively received impressions to face them rightly4 ,kant1 coming to the problem with different prepossessions1 with the belief that most knowledge was analytic1 was impressed with ,hume's proof that the principle of causation could not be derived from analysis4 ,the very basis of all science of nature1 then1 contradicted the belief that knowledge was analytical4 ,kant was also1 with ,hume1 convinced that the principle of causation was not derived from experience1 for he saw that experience assumed it4 ,at the same time1 he was not prepared1 like ,hume1 to explain it away4 ,further1 he saw that the problem raised by the principle of causation was a wide one4 ,for other judgments1 he held1 are both synthetic and a priori1 among them mathematical judgments4 ,as we shall see afterwards1 ,kant proved the impossibility of arriving at knowledge of ,god or the soul by mere analysis of concepts4 ,the judgments of metaphysics1 about ,god or the soul1 are also synthetic4 ,but the validity of the judgments of metaphysics is under dispute4 ,if we examine the synthetic a priori judgments of mathematics and of science whose validity is certain1 we may then discover whether such judgments in metaphysics can or can not have similar certainty4 ,we may thus see that the problem of the possibility of synthetic a priori judgments is a restatement in logical terms of the problem of the relation between the a priori sciences and metaphysics4 ,something more must be said of the importance of synthetic a priori judgments in ,kant's account of knowledge4 ,their existence1 we have seen1 exposes the shortcomings of both rationalism1 which allowed only for analytic a priori judgments1 and empiricism1 which allowed only of synthetic a posteriori judgments4 ,both these theories tended to regard knowledge as an analysis or description of what was present to the mind1 and differed really only in their view of what was present4 ,for1 though the empiricist thought of empirical knowledge as synthesis1 the synthesis was not ascribed to the mind1 but to associating ideas2 the mind only observed1 and knowledge was merely the apprehension of objects by the senses4 ,we see what is before our eyes1 and notice the differences and similarities in what is before us4 ,the rationalist conceived of thought as simply apprehending the nature of the real1 freed from the illusions of sense perception4 ,the mathematician has before his thought the nature of a triangle1 and sees intellectually what that nature implies4 ,we may try to mediate between the two by saying that while all knowing is observing1 some is observing of objects of thought and some of objects of sense1 the one being called understanding1 the other perception4 ,in most scientific judgments1 however1 we are not simply observing objects either of thought or of sense4 ,scientific judgments are more than descriptions of what is present to the mind or to the senses2 they are essentially anticipations4 ,they go beyond what is immediately given4 ,this is shown by the fact that it is the characteristic of a scientific proposition that it can be verified4 ,if we understand it rightly1 we see that it implies that1 under such-and-such conditions1 such-and-such things will be experienced4 ,hence the importance of experiment to science4 ,a scientific proposition is1 of course1 grounded on observation of perceived fact and understanding of universal connection1 but it is an assertion of something beyond that4 ,if1 then1 all scientific judgments are synthetic1 and if both rationalism and empiricism failed to account for the manner in which such judgments go beyond what is immediately given to the mind1 ought we not to say that the real problem for ,kant is to show not merely how synthetic a priori judgments are possible1 but how any synthetic judgments are possible8 ,this seems at first sight plausible1 but the suggestion must be rejected2 for1 when ,kant asks how a judgment is possible1 he is not asking how we come to make it1 but how we know that it is valid4 ,now1 if we consider any empirical judgment about the facts of nature1 we must recognise that ,locke and ,hume were right in denying certainty to such judgments4 ,in all general statements about concrete facts we to a certain extent go beyond our evidence4 ,empirical scientific statements are not theoretically certain4 ,they may1 of course1 be certain enough for all practical purposes4 ,they are reasonable expectations of what will happen1 but reasonable expectation is a very different thing from the certainty of mathematical insight4 ,now ,kant maintained that1 while such empirical judgments are not certain1 they all imply the certainty of a number of general principles on which they depend4 ,these general principles are the synthetic a priori judgments with which he is especially concerned4 ,when we apply the principles of trigonometry to an engineering problem1 we know that our measurements are only approximate1 and that the result also will only be approximate2 but the possibility of arriving at such approximate results depends on the absolute truth of the trigonometrical principles1 and on the assumption that they express not simply the agreement or disagreement of ideas1 but hold of the real4 ,when we apply the rules of arithmetic to counting objects1 there may be a certain arbitrariness in deciding on our unit4 ,there is no such arbitrariness in the rule4 ,all scientific judgments of causation are only approximately certain1 but they all imply the certainty of the principle of causation1 and are based on the assumption that such a principle is of universal application4 ,this and the other principles assumed in our empirical judgments are1 then1 the synthetic judgments with which ,kant is concerned4 ,now1 it is of the nature of our empirical knowledge that it is fragmentary and not uniform1 that we are concerned with an indefinite number of things whose connections we do not wholly understand1 and which we cannot therefore anticipate4 ,yet we assume that all these objects will obey the rules of arithmetic and geometry1 and will all be subject in their changes to the principle of causation4 ,on such assumptions all the sciences of applied mathematics depend4 ,how are they justifiable8 ,that is ,kant's question4 ,kant1 when he considers mathematics1 is concerned with the assumptions of applied mathematics1 of those sciences which1 though mathematical1 make statements about existing objects1 and in which the old distinction between understanding and perception which was based on the difference in the objects of these two faculties breaks down4 ,the sciences which ,kant is investigating imply that principles which are clearly not derived from mere observation are yet the basis on which we order and arrange what we observe4 ,now1 if we held that the objects of mathematics were independent entities quite separate from the things we perceive1 it would be impossible to explain how we might assume that the things we perceive would be subject to the rules of mathematics4 ,if1 on the other hand1 we held that in mathematics we were simply concerned with the various objects of the senses1 it would be impossible to explain how mathematics can have a generality and necessity which no statements can have which rest on observation of the various things we see4 ,the existence of applied mathematics implies firstly that understanding and perception are distinct1 and that neither of them can be reduced to the other1 for that would mean that we should have to give up either the element of observation and experiment or the element of necessity and a priority1 and secondly1 that understanding and perception are combined1 and must be combined for any advance in science4 ,now1 ,kant finds his answer to the problem he has raised by concentrating his attention on the fact that1 while understanding and perception are distinct1 they are both present in all knowledge4 ,his argument is that we are necessarily in a difficulty if we think of understanding and perception as having each its separate objects1 and then try to explain their combination4 ,if we begin with their combination1 we may see that the reference of principles of thought to objects of sense is not an accident1 but that these principles of thought or of understanding1 as ,kant calls them1 are only concerned with objects of sense1 and have no other meaning4 ,if we object1 ,but how can principles of thought be universal if they are concerned with the many and varying objects of sense8 ,kant's answer is that they are not concerned directly with these objects1 but with the conditions under which these objects can be understood4 ,they are therefore not statements about objects1 but statements of the conditions of possible experience4 ,if we find out that all perceiving and thinking imply certain conditions1 then we can affirm the validity of principles based upon these conditions1 so long as we do not try to apply the principles beyond our perceiving4 ,we may put the point in another way by asking by what right the mind can prescribe to or anticipate experience4 ,kant's answer is just in so far as we can determine the conditions under which alone objects can be known4 ,if that can be done1 we can say1 ,these principles will hold of objects in so far as they are known4 ,in the preface to the second edition of the ,critique of ,pure ,reason ,kant reverts to the discoveries of ,galileo and ,torricelli1 and points out that their success was due to their asking of nature the right question1 and the right question was that which reason could understand4 ,when ,galileo let balls of a particular weight1 which he had determined himself1 roll down an inclined plane1 or ,torricelli made the air carry a weight1 which he had previously determined to be equal to that of a definite volume of water1 a new light flashed on all students of nature4 ,they comprehended that reason has insight into that only which she herself produces on her own plan1 and that she must move forward with the principles of her judgments1 according to fixed law1 and compel nature to answer her questions1 but not let herself be led by nature1 as it were in leading-strings4 ,otherwise accidental observations1 made on no previously fixed plan1 will never converge towards a necessary law1 which is the only thing that reason seeks or requires4 ,reason1 holding in one hand its principles1 according to which alone concordant phenomena can be admitted as laws of nature1 and in the other the experiment which it has devised according to those principles1 must approach nature in order to be taught by it1 but not in the character of a pupil who agrees to everything the master likes1 but as an appointed judge1 who compels the witnesses to answer the questions which he himself proposes4 ,kant1 here1 is concerned with reason in its application to experience1 and he makes it clear that there is much in all such inquiries which cannot be anticipated a priori4 ,reason must approach nature in order to be taught by it4 ,the answer to the questions and experiments cannot be known beforehand4 ,the empirical element in science cannot be explained away4 ,reason dictates not the answer but the question1 and so far the form of the answer4 ,reason1 then1 it is suggested1 is concerned with the principles or conditions1 according to which we can understand things4 ,it is not a method of observing or analysing objects2 rather it states the methods and principles according to which objects must be observed if they are to be understood4 ,the principles are not statements about the nature of objects1 but principles of the possibility of experience4 ,this new attitude to reason ,kant describes as the ,copernican change in philosophy4 ,it constitutes ,kant's idealism4 ,its nature and importance we must examine in the next chapter4 99,,chapter ,,iii99 99,,kant',s ,,idealism4 ,,time ,,and ,,space99 ,the great discovery which ,kant considered he had made as to the nature of reason was that reason was not a method of observing objects as they really exist1 but was concerned directly only with our ways of understanding objects4 ,this discovery is the essence of ,kant's idealism1 and its main purport is expressed in the distinction ,kant so often makes between things in themselves and phenomena4 ,this distinction is used as the key to the solution of all his difficulties4 ,but the doctrine it implies is very easy to misunderstand1 partly because idealism is generally used in a very different sense from that in which ,kant uses it1 partly because ,kant's statement of the distinction between things in themselves and phenomena depended on a view of knowledge which he was very much concerned to refute1 but with which we are not now familiar4 ,if we are to understand ,kant's philosophy1 we must know what he means by idealism1 and wherein his idealism differs from that of his predecessors4 ,the word idealism is1 naturally1 contrasted with realism4 ,it suggests an assertion that something is not real1 but only an idea4 ,if we know it to be combined with a distinction between things in themselves1 and phenomena1 or appearances1 it seems to suggest that the objects of knowledge are somehow illusions1 or only appearances in the mind1 as contrasted with real things4 ,something like this had been held by ,kant's predecessors4 ,for the fundamental principle of the idealism on which most of ,kant's predecessors had been agreed1 and which is sometimes called ,cartesian1 and sometimes subjective idealism1 is that the mind somehow knows itself and its own actions and states1 with more directness and certainty than it knows external objects4 ,the doctrine is commonly based upon a confused view of sense perception4 ,sense perception is obviously possible only through processes in the sensory organs1 and objects were thought of as producing impressions through the sensory organs in the brain1 and the mind as then becoming aware of them in the brain4 ,hence1 when ,locke says that the mind only knows its own ideas1 he tends to mean 7though the facts are sometimes too much for him and he is nobly inconsistent7 that the mind only knows objects inside the brain4 ,the main objection to this doctrine1 apart from the fact that it is based on a confusion1 is that it makes it quite inexplicable how the notion of an outside world ever arises4 ,for if we know1 and must eternally know1 only ideas inside our head1 why should we ever imagine that there an outside world exists4 ,yet if nothing outside us were observed--if we knew of no process which went on between outside objects and the brain1 the doctrine would have no basis on which to rest4 ,there cannot be any meaning in saying something is only an idea1 if we do not know what is real in the sense of its having an existence independent of our minds4 ,locke supposed that1 although we knew only ideas1 we could somehow refer from our ideas to an outside world4 ,for he thought that truth was concerned with the agreement of our ideas with reality4 ,this form of the doctrine1 the commonest1 is sometimes called ,representationism4 ,for it thinks of the mind as concerned with representations1 or pictures1 or images which it may compare with the real objects4 ,its futility is obvious enough4 ,we can only compare a picture with the thing it represents1 if we can know both4 ,if we can only know ideas1 we can never know that they are only ideas1 and can never compare them with anything else4 ,this difficulty was seen by ,berkeley1 the most consistent of subjective idealists1 and led him to deny the existence of outside objects1 and hold that existence or reality meant being perceived and nothing more4 ,but if we take ,berkeley's position1 it becomes very difficult to say what we mean by judgments being true4 ,if things only exist as we think of them1 or perceive them1 or rather if they are only our thinking of or perceiving them1 the question of the truth or falsity of our statements about them cannot arise4 ,this idealism ,kant is careful to refute1 and he points out that there is no evidence for its fundamental proposition that we know our mind more directly than we know objects4 ,we are only conscious of ourselves in knowing something not ourselves4 ,we do not invent the notion of externality or outsideness in space from an experience in which it originally has no part4 ,externality is implied in our most simple experience4 ,we begin with consciousness of outside things1 and only become conscious of our own mental states or processes later4 ,but it is important to observe that1 the truth or falsity of subjective idealism has no bearing whatsoever on the question with which ,kant was concerned4 ,if ,i ask how ,i can lay down rules about what ,i have not yet experienced1 ,i am not in the least helped by being told that ,i only experience what is in my mind4 ,for the question will equally arise1 ,how do ,i know what is going to be in my mind8 ,the question idealism ordinarily discusses1 as to whether the objects of our awareness are in our mind or outside1 are in their nature mental and dependent on the mind or not1 is entirely and absolutely irrelevant to ,kant's purposes4 ,but it is a fact1 and one that has got to be explained that in judgment we go beyond what is present to our minds1 and that1 in so anticipating what we shall experience1 we assume that certain principles hold of all that has been or may be present4 ,with that difficulty idealism1 as ordinarily understood1 has nothing to do4 ,representationism tried to give some account of this going beyond what is present to our minds by suggesting that truth is a reference from ideas to reality2 but1 as we saw1 if we know only ideas1 such a reference is impossible4 ,the doctrines opposed to representationism1 that only ideas exist1 or that we directly know real objects1 allow the existence of nothing contrasted with what we are apprehending to which a reference in judgment can be made4 ,no one who is satisfied with any of these positions can have seen ,kant's problem4 ,if ,kant then1 is not a subjective idealist what does he mean by saying1 as he constantly does1 that we only know phenomena1 and why should that limitation of knowledge help him in any of his difficulties8 ,he means1 in the first place1 that all knowledge depends upon perception4 ,the first paragraph of the first part of the ,critique of ,pure ,reason makes that clear4 ,whatever the process and the means may be by which knowledge reaches its objects1 there is one that reaches them directly and forms the ultimate material of all thought1 viz4 perception4 ,this is possible only when the object is given1 and the object can be given only 7to human beings1 at least7 through a certain affection of the mind4 ,now1 although we perceive an objective reality1 sense perception obviously gives a very imperfect knowledge of objects4 ,we see only some sides and aspects of things1 and not others4 ,what we see depends on changes in our position4 ,further1 we know that what we see is only a small part of the nature of anything4 ,we think of reality as an interconnected system1 but we only perceive a very small part of it1 and what we perceive depends upon the particular time and the particular part of space in which we live4 ,in our experience we are never really content simply with what we perceive2 we perceive much too little for that4 ,we are always inferring from what we see to something beyond it4 ,what is that something beyond1 which1 as we have seen1 is implied in all judgment8 ,we might hold that it was the things as they really are as distinguished from things as they appear1 or phenomena1 and that1 when we turned from perception to thought1 we turned from illusion to reality4 ,kant denied this4 ,he held that1 if you examine a scientific judgment about anything you perceive1 such as that yellow thing is gold1 you will find that1 if you know what the judgment means1 you will be able to say3 ,then1 under such-and-such conditions--if you weigh it1 for example--you will have such-and-such a perception4 ,the appeal is not from what you perceive to what you think1 but from what you perceive now to what you will perceive under such-and-such conditions4 ,such a reference indeed1 implies thought and what is ordinarily called a concept2 but our knowledge of concepts used in science always means that1 if we know what is meant e4g4 by calling anything gold1 we know how it will behave under such-and-such conditions4 ,the concept1 in ,kant's words1 is a function of unity in our representations4 ,the task of thought1 then1 is not to turn the mind away from what we perceive1 but to help us to transcend some of the limitations of our perceptions1 or1 to speak more accurately1 to set somewhat further back the limits of our perception2 for thought never entirely transcends these limits4 ,our knowledge is always conditioned by the fact that we are finite minds living in a particular place and at a particular time2 but thought can extend the range of our perception in space and in time4 ,the limitations of our perception have1 for ,kant1 a double aspect1 which determines his division of the first part of the ,critique into two parts--the ,a,esthetic and the ,analytic4 ,in the first place1 our direct knowledge of space at any one time is always knowledge only of a part of space2 our direct knowledge of time1 whether in present consciousness or in memory of our own experience1 is knowledge of only a part of time2 and the things in the space we directly perceive1 or in the time we experience1 are what they are by their relation to space outside the space we see1 and time beyond the time we experience1 and that limited space and time we treat1 therefore1 as parts of one all-embracing space and one all-embracing time1 and in the conception of an indefinitely extended space and time we can think of the space in which all things exist1 and the time in which all things occur1 of which we only see and experience a small part4 ,the science of astronomy obviously talks of space and time far beyond anything we could ever perceive1 but we go beyond such direct perception in such simple expressions as forty miles from here or three days hence4 ,and1 when ,kant says that space and time are only phenomenal1 he does not mean that they are mental1 but that we only know them through perception1 and that we get at absolute space and time not by going from what we perceive to what we think1 but by thinking of what we perceive indefinitely extended4 ,all definite statements about space must come back in the end to so far from here1 all about time to so long from now1 and the fact that all our knowledge of space and time is got by adding to or extending in thought the space and time we directly perceive does1 according to ,kant1 solve some obstinate puzzles about the nature of space and time4 ,in the second place1 if we consider our knowledge of objects1 we realise that1 as we said1 at any one moment we only perceive them in part or from one position4 ,what we directly perceive of them is fragmentary and discontinuous1 one aspect seen now1 and another aspect seen at another time4 ,but we do not think of the things as existing in that discontinuous way2 we think of them as having a nature of their own4 ,that does not contradict1 but is something very much more than1 what we perceive1 and our knowledge of any object is got by piecing together the aspects we directly perceive2 but that piecing together1 or synthesis1 is not haphazard4 ,it is governed by rules--rules partly derived from the nature of the particular thing we are concerned with1 and partly more general rules1 which come from the relation of this work of piecing together to the framework of space and time by help of which it is done4 ,kant's conception of knowledge1 then1 is something like this4 ,each of us is in direct contact with reality1 but we perceive directly only a small part of it1 and1 as our consciousness moves on in time1 and as we change our position in space1 we are directly conscious of different small portions of reality4 ,a part of the whole is illumined by direct perception1 but the whole stretches beyond that indefinitely in space and time4 ,in the part we directly perceive there is a temporal order and a spatial order4 ,things are given to us arranged in space and ordered in time1 and these arrangements or orders in the space and time that is directly given to us in perception have certain rules1 and we think of these principles of arrangement as extending indefinitely beyond the space and time given to us in perception4 ,when we make judgments about reality beyond our perception1 we think of things as so arranged in the space and time beyond our perception as we should see them arranged were the range of our perception sufficiently wide4 ,further1 it is most important to remember that we do not remain in one place and at one time and make guesses of what may happen in the darkness beyond4 ,though our perception at any one moment is limited1 we can connect what we see at one time with what we see at another4 ,we can1 by means of language and writing1 use the perception of others to fill out our experience1 until gradually our scientific judgments1 our knowledge of what we should perceive under all sorts of possible experience1 seems to bulk much more largely than could our individual perceptions4 ,but we are still1 ,kant would say1 getting at our knowledge of what is beyond by piecing together what we and other people have perceived1 and the whole is always much more than that4 ,what1 then1 is meant by the contention that we can know things in themselves which ,kant is earnest to refute8 ,it might mean that we do in perception attain to a complete knowledge1 but that would be obviously untrue4 ,as ,kant understood the claim1 it meant rather something like this3 ,in thought we are obviously not limited by our perception4 ,we are always assuming certain principles1 such as the laws of space or the principle of causation1 to hold of all reality1 both what we do and what we do not directly perceive4 ,may we not say1 then1 that these principles hold of all reality1 and argue from that fact to what the nature of the whole must be8 ,if everything that we know is caused1 e4g41 may we not apply the principle of causation to all reality and say that it must have a cause8 ,when we come to consider the ,dialectic1 the second main division of the first ,critique1 we shall notice ,kant's detailed analysis of these arguments1 and how he points out that you can in this way get contradictory results4 ,in the meantime it must be observed that in these arguments we start from principles applied to what we perceive and expressing connections between the different things we perceive1 and then apply them beyond everything we do or could perceive4 ,that means that we imagine that we can take these principles out of relation not only to this or that detail of perception1 but out of relation to any perception at all1 and thus apprehend reality by thought independently of perception4 ,kant's answer is that thought cannot directly apprehend the nature of the whole1 and these universal principles1 such as the principle of causation1 are only principles by which we connect one perception with another to amend the discontinuous and fragmentary nature of our perception2 they are rules for the synthesis of what we perceive4 ,by so synthesising our perceptions we come to a less imperfect knowledge of the whole1 but apart from perceptions the principles have no meaning at all4 ,kant's idealism1 i4e4 his insistence that we know only phenomena1 not things in themselves1 is relevant to his problem1 because it implies the denial of the view that thought has objects apprehended independently of perception1 and because it insists that we can only know directly what we perceive1 or things as they appear to us1 that in our process from perception to knowledge we start with what is present to our perception and end with what is or with what might be present to our perception1 and that this process is possible by reason of our continued consciousness in time4 ,the process1 ,kant holds1 is governed by certain principles4 ,these depend upon the part played by space and time in all our perception1 and the manner in which we employ space and time in piecing together our discontinuous perceptions4 ,now1 obviously it is quite possible to hold this position without having thought out what is implied in being present to the mind in perception4 ,this is what ,kant did4 ,he describes perception in different and inconsistent ways4 ,the reason for this inconsistency is that ,kant is not concerned with the nature of perception1 but with the relation of what is immediately perceived to what is not but may be immediately perceived1 and he therefore never worked out any consistent account of perception4 ,he sometimes talks of perception reaching objects directly1 and refutes the view that we perceive only what is in our mind4 7,this1 indeed1 is implied in his distinction of space and time as forms of external and internal sense respectively47 ,but usually he takes the ordinary idealist view that we do not perceive things1 but affections produced in us by things4 ,owing to this inconsistency ,kant constantly seems to be stating very much more than he has any right to4 ,this is especially true in all that he says about knowledge being confined to phenomena and not extending to things in themselves4 ,when he talks of our knowing only phenomena1 he sometimes seems to mean that we know objects1 things in themselves1 only in part1 in so far as they appear to us4 ,that would make the distinction between the phenomenon and the thing in itself a distinction between the same thing imperfectly and perfectly understood4 ,he sometimes1 and this is his more usual view1 seems to mean that we are aware of appearances1 entities separate and distinguishable from the objects which produce them in our minds4 ,but if we work out in any of ,kant's arguments the point of his appeal to the fact that knowledge is only of phenomena1 we shall find that in every case the difference between a subjective idealist and a realist view of perception1 of what being present to the mind means1 is irrelevant1 and that his argument holds on either theory4 ,we must now turn to ,kant's account of space and time which is given in the ,a,esthetic1 the first part of the ,critique4 ,he begins by showing the impossibility of the two views of the nature of space and time which then held the field1 the views of ,newton and ,leibniz4 ,newton had thought of space and time as realities1 things in themselves existing along with other things4 ,but obviously we cannot think of space as a separate thing existing by itself2 for space without things would have no determination or possibility of determination1 and would be to us just nothing1 whereas1 as it is1 it is something to us4 ,the same holds of time4 ,the ,newtonian doctrine1 ,kant says1 forces us to assume two eternal1 infinite1 and self-subsisting non-realities1 which are there1 without any reality in them1 only that they may comprehend all reality4 ,just because things are in space and time1 space and time are not themselves things4 ,but if this makes us say that space and time are only relations between or qualities of things1 we find ourselves in difficulties as obvious4 ,we do not come to apprehend space and time by comparing things and seeing that they have a common quality of being spatial or temporal1 as we come to apprehend redness1 e4g41 by seeing red things4 ,the perception of space and time is implied in each and every perception of things4 ,we cannot1 therefore1 derive them from our study of things2 we must begin with them4 ,further1 ,kant notices1 as against ,leibniz1 that space and time are not ordinary concepts because they have no instances4 ,different men are instances of man1 but different spaces or times are only parts or determinations of the one space and the one time4 ,as against the view1 then1 that would make space and time only relations1 derived from our comparison of things which are not temporal or spatial1 ,kant insists that space and time are a priori4 ,we cannot see things without seeing them outside one another--i4e4 in space--or experience succession or change without experiencing it in time4 ,space and time1 then1 have a certain independence of things in space and time4 ,the qualitative differences of things in space or events in time do not affect the nature of space and time1 and we can and do study and discuss spatial and temporal relations quite independently of such differences4 ,space and time1 then1 can be abstracted from things in space and time4 ,yet1 on the other hand1 we cannot think that space and time exist independently of things4 ,they do not exist in abstraction2 for1 though the specific differences of things in space and time are irrelevant to the nature of space and time1 if there were no things1 or if there were no differences1 there could be no space and time as we know them4 ,the empirical perception1 says ,kant1 is not compounded of phenomena and space1 of the sensation and the empty perception4 ,space and time1 therefore1 ,kant says1 are not things in themselves4 ,what1 then1 are they8 ,kant's answer is that they are forms of our perception4 ,space is the form of external perception1 and time is the form of internal perception1 and ,kant holds that by this answer we can understand both how our knowledge of space and time may be a priori1 how spatial and temporal distinctions may be abstracted from the differences of things1 and how we may avoid the difficulties consequent on regarding time and space as independent things4 ,what1 then1 does ,kant mean by form8 ,he seems to mean two things1 which he does not clearly distinguish4 ,the first meaning is best described in his own words3 ,in the phenomenon ,i call what corresponds to the sensation the matter of the phenomenon1 and that which causes that the manifold of the phenomenon is perceived as arranged in specific relations ,i call the form of the phenomenon4 ,we are here face to face with the ultimate difference of form and matter1 or order and that which is ordered4 ,when ,kant calls time and space the form of our perception he is simply calling attention to the fact that in all that we perceive we find this distinction4 ,it is something found1 given1 not made by us4 ,by the word form ,kant does not mean anything specially subjective as contrasted with matter or content1 for he carefully distinguishes between space and time1 and such qualities as colour1 which get their nature in part1 he thinks1 from the specific nature of the sense organ4 ,compared with such qualities space and time are objective4 ,the phrase forms of our perception1 then1 does not really explain anything about space and time2 it only emphasises the fact that the distinction between space and time and objects in them is found in what we perceive1 and that there is no meaning in discussing either side of the distinction as though it were quite independent of what we perceive4 ,but form has also another meaning which justifies ,kant in calling space and time only forms of our perception1 and hence subjective4 ,for1 while these forms are found in what we perceive1 the distinctive part which they play in our knowledge is due to the fact that we use space and time as a framework by which to connect our scattered experiences4 ,we come to think of the space and time we perceive as parts of an absolute space and an absolute time4 ,we perceive parts of space and time1 but absolute space and absolute time we do not perceive4 ,they are the form we perceive imagined indefinitely extended4 ,we order the particular parts of space and time which we do perceive in reference to absolute space and time4 ,yet absolute space and time are only known through the finite parts of space and time which we actually experience4 ,hence absolute space and time are not perceived realities or perceived orders1 but ways in which we organise and arrange what we perceive4 ,now1 the qualities of space and time which are hard to think of as the qualities of a thing that exists1 i4e4 their infinite divisibility and infinite extension1 are qualities of absolute space and time4 ,when we say that space is infinitely divisible1 we do not mean that any existing thing is made up of an infinite number of parts4 ,the divisibility of space and the divisibility of matter are quite different4 ,an inch as a spatial determination is infinitely divisible1 but the divisibility of the actual stuff which any inch may measure is a matter of empirical investigation1 and ought to admit of a definite answer4 ,that means that1 while we use determinations of space which we consider infinitely divisible and infinitely extensible to measure things in space1 we do not consider that these determinations1 fractions1 or multiples of inches or centimetres1 have anything to do with the constitution of the thing they measure4 ,it was not put together in fractions of inches4 ,thus we must distinguish between space as the form of what we perceive1 the next-each-otherness of things1 and the use we make of that form to construct by means of measurement order in all different perception4 ,the first is obviously the form only of what we perceive1 and gives rise to no transcendental questions4 ,but the second1 infinite space1 though it seems to transcend our perception1 has still only meaning in reference to perception1 is only a way of ordering our perceptions4 ,the same holds good of time4 ,we can see now what ,kant means by saying that time and space are empirically real and transcendentally ideal4 ,kant does not maintain that space and time are illusions4 ,they are a constant element of what is given us in perception4 ,it is only when we try and go beyond our perceptions1 and take space and time as things existing independently of what we perceive1 thus trying to transcend the limits of possible perception1 that we fall into illusion4 ,space and time have meaning only as elements in what we perceive1 or in connecting what we perceive now with what we may perceive4 99,,chapter ,,iv99 99,,the ,,categories ,,and ,,the ,,principles ,,of ,,pure ,,understanding99 ,kant makes the distinction between perception and understanding depend upon the distinction between the receptivity and the spontaneity of the mind4 ,in the ,a,esthetic he has been concerned with time and space as elements in what seems to be given to the mind4 ,before we begin to ask the questions of science1 before we analyse1 describe1 or classify1 before we have to think1 we perceive4 ,time and space are not got at by thinking or generalisation4 ,for before we can say anything about any part of our experience1 it is given us in a certain spatial and temporal order4 ,if we open our eyes at any moment1 we are1 without any conscious effort of thought on our part1 confronted with an elaborate content4 ,it seems simple to distinguish this receptive attitude of the mind in perception from its activity in thinking4 ,the distinction is not really so simple as it appears4 ,for we all know that what we perceive depends1 at least to some extent1 on the mind's activity4 ,we are familiar with the reflection that men see what they want to see or what they are looking for4 ,this is clearly shown in the case of hearing by the difference in what we hear when we are listening to a language we understand and when we are listening to an unfamiliar language1 or in the common experience when1 after failing to hear what someone has said1 we think what it must have been1 and then seem to recall the sound1 not as we heard it1 but as we should have heard it if we had heard it rightly4 ,anyone who reflects on the process of fast reading will realise that we do not perceive or notice all the letters on a page2 we fill in from our imagination1 as we discover when we read words that are not on the page4 ,it is a very hard thing1 giving up all interpretation and inference1 to describe faithfully just what is there to see4 ,passive perception1 then1 does not exist1 and our thought affects our perception4 ,yet1 at the same time1 the distinction between thought and perception1 although not simple1 is real4 ,for although our previous thought affects our perception and we see things already classified1 see books1 and tables1 and chairs1 not merely coloured surfaces1 yet we can distinguish between simple immediate perception and the process of thought which begins when we ask1 ,what is that8 i4e4 when we begin to make judgments4 ,the characteristic of thought1 according to ,kant1 is synthesis1 or putting together1 and all synthesis is the work of the mind4 ,when we begin to describe and classify the contents of our perception1 we pick out separate qualities from the continuous whole we perceive1 and group them together4 ,this grouping is1 of course1 determined by the likenesses and differences which we perceive everywhere1 but we do not1 in judging1 confine ourselves to noticing likeness and difference4 ,for any content of our perception has some point of resemblance1 and some of difference with any other4 ,we are concerned with likenesses that go with or are the signs of other likenesses4 ,on the basis of perceived likeness we erect the notion of things and qualities of a certain kind4 ,in doing this we go beyond what we see1 and unite and arrange the contents of our perception through concepts4 ,that is what we are doing when we say that is a so-and-so4 ,for example1 if ,i say that rock is like a dog1 ,i am simply expressing a likeness ,i perceive4 ,i do not imply that the rock is therefore alive or will bark2 ,i am not going beyond how the rock looks2 but if ,i say that object is a dog1 ,i assert that all that is implied in being a dog will hold of that object1 i4e4 that it will have a certain appearance and behaviour1 which is known4 ,i can anticipate1 therefore1 how it will behave1 look1 and sound under certain circumstances4 ,all these phenomena1 the appearance1 the barking1 and running1 though ,i may perceive them at different times and places1 are grouped together in the judgment1 ,that is a dog4 ,this is what ,kant means by saying1 ,concepts depend on functions4 ,by function ,i mean the unity of the act of arranging different representations under one common representation4 ,concepts1 therefore1 always refer to perception1 and it is by means of concepts that we are enabled to introduce such order into what we perceive1 that we can anticipate from what we perceive what we shall perceive4 ,perceptions without concepts are blind4 ,without concepts what we perceive would not lead us in any way beyond what is immediately given4 ,thoughts without contents are empty4 ,concepts are nothing1 and have no meaning apart from the contents of perception which they unify4 ,most of these concepts are what is called empirical4 ,we get at them by observing likenesses and differences in what we perceive1 and observing which are significant and important1 and which are what we call accidental4 ,science1 in its discovery of laws1 is only carrying further this process which is implied in all simple judgments4 ,by observing likenesses and differences1 their uniformities and variations1 and discovering those which are a key to the rest1 we improve our concepts1 and thereby have more knowledge of what we call natural laws1 and can more and more anticipate experience4 ,with these empirical concepts and their development ,kant is not concerned4 ,but there are certain concepts of which ,hume had observed that they are not obtained in the ordinary way from an examination of the contents of experience4 ,the two with which he chiefly concerned himself were substance and cause4 ,these concepts seems to play an especially important part in the ordering and arranging of the concepts of experience4 ,for the work of science1 in moving from a simple observation of likenesses and differences to a knowledge of empirical laws1 depends upon certain assumptions or principles1 like the principle of causation or the principle of the conservation of energy4 ,these principles imply concepts not derived1 like the others1 from generalisation from experience2 they are the synthetic a priori judgments which1 as we have seen1 constituted a special problem for ,kant4 ,kant is first concerned to ask where these a priori concepts come from1 and how many of them there are4 ,this inquiry he calls the metaphysical deduction of the categories4 ,having answered that question1 he then goes on to ask by what right we assume these principles in our dealing with experience4 ,this1 the most important and difficult section of the ,critique1 he calls the transcendental deduction of the categories4 ,most concepts1 as we saw1 are empirical4 ,we take certain likenesses and differences we observe as the mark of a real unity in the things4 ,the different natures of different things we do not fully know1 but we distinguish them by the different uniformities we observe1 and in order to explain our experience we assume the unity underlying these perceived likenesses4 ,iron1 dog1 fire1 are names for the natures of things which we see manifested in our experience4 ,the concept1 then1 is got from what we perceive1 though it stands for something more than we perceive4 ,how1 then1 can there be any concepts which are not got from the empirical differences of things we perceive8 ,let us take such a concept as substance1 and see whether we can discover where it comes from4 ,locke had been puzzled by discovering that he could not1 in any object1 find anything which was its substantiality4 ,calling anything a substance is not like saying that it is hard1 or green1 or heavy2 we are not concerned with specific differences in things1 but we are not therefore saying what is meaningless4 ,there is something1 namely substance1 which we can distinguish from the hardness1 or colour1 or weight that we perceive4 ,that something we do not perceive2 we assume it whenever we talk of a thing being hard1 and green1 and heavy4 ,a thing's substantiality is just the unity of its perceivable qualities4 ,but such a unity is implied in the concept of any object4 ,substance1 then1 is a name for one of the general principles implied in our assuming that what we perceive are real objects4 ,kant generalises the result of this inquiry into particular concepts of this kind4 ,he holds that a priori concepts or categories 7i4e4 the concepts which we do not get from empirical differences of things7 stand for principles implied in thinking of things as objects or in judging4 ,if we want1 therefore1 to find out the number of the categories1 we must ask how many different kinds of unity are implied in judgment1 or what are the conditions of judging any object4 ,kant does not here help1 but rather misleads us in this inquiry4 ,for he unfortunately thought that the different kinds of judgment could be discovered without further ado by taking the list given in formal logic4 ,he therefore first makes a list of categories1 based on the logical forms of judgment1 and then tries to show the connection between these categories and the principles which were1 as he had discovered1 assumed in the mathematical sciences4 ,the actual movement of his thought is1 ,i think1 different4 ,he asks if there are any general conditions implied in all judgment4 ,his answer is that all judgments1 all statements1 that is1 which claim to be true1 imply determination of time and space4 ,from that determination certain principles can be deduced4 ,if time and space are implied in all judging1 then these principles will equally be implied1 and will hold of all things which can be objects for us4 ,it will be easier to understand ,kant's arguments if we invert the order of the ,critique and begin with examining the nature of the principles of the understanding or of one of them4 ,the categories which are of importance in ,kant's argument are quantity1 quality1 substance1 causation1 and reciprocity1 and necessity1 possibility1 and actuality4 ,the last three are less important than the others1 and we shall not deal with them4 ,to the first five of these categories correspond the following principles3 7#a7 ,quantity4 ,all phenomena are1 with reference to their perception1 extensive quantities4 7#b7 ,quality4 ,in all phenomena the real1 which is the object of a sensation1 has intensive quantity1 that is1 a degree4 ,the last three are classed under a general heading of ,analogies of ,experience1 whose principle is3 ,experience is possible only through the representation of a necessary connection of perceptions4 ,they are 7#c7 ,the principle of the permanence of substance4 ,in all changes of phenomena the substance is permanent1 and its quantum is neither increased nor diminished in nature4 7#d7 ,principle of the succession of time1 according to the ,law of ,causality4 ,all changes take place according to the law of connection between cause and effect4 7#e7 ,principle of co-existence1 according to the law of reciprocity or community4 ,all substances1 so far as they can be perceived as co-existent in space1 are always affecting each other reciprocally4 ,these principles1 ,kant points out1 are assumed in the sciences of applied mathematics4 ,the application of geometry to the world we experience assumes that all phenomena are extensive quantities2 physics assumes that quantitative expression can be given to the qualities of objects other than their size1 their weight1 e4g41 and all scientific determination of change assumes the three principles which ,kant calls analogies of experience3 the permanence or conservation of amount in changes1 the necessary connection of things in time1 and the reciprocal interdependence of things which exist at the same time4 ,these principles are not proved by science2 their validity is assumed in all scientific investigation4 ,on what1 then1 does it rest8 ,we shall follow ,kant's argument more easily if we take his account of one of these principles--the principle of causation4 ,for what is said of that will hold1 with necessary changes1 of the others1 and1 as we have noticed1 it was ,hume's criticism of causation which first led ,kant to formulate the critical problem4 ,hume had pointed out that we had never such insight into causal connection as to be able1 from mere inspection of a cause1 to foretell the effect without any reference to experience4 ,he declared1 on the contrary1 that there was no difference between observed succession and causation so far as concerned the objects observed4 ,in each case we see first one thing and then another4 ,the difference1 then1 between mere succession and causal connection can only be in us1 in the way we come to feel about certain successions we observe4 ,in technical language1 the necessity of causation is subjective4 ,how does ,kant answer this position8 ,he begins1 as is usual with him1 by taking the problem a little further back4 ,causation is a connection we predicate between what we see at one time1 and what we see at another4 ,now if we take into account only the fact that we see one thing at one time and another thing at another1 there is no difference between what we see when we successively see two things which we judge to co-exist1 and when we see two things one of which we judge to have succeeded the other in time4 ,hume1 therefore1 proved too much4 ,his argument would show that we have no grounds for distinguishing between apprehension of succession and succession in apprehending1 but such a distinction is the basis of our apprehension and understanding of change or movement4 ,if1 then1 we examine how we distinguish between apprehension of succession and succession in apprehending1 we may see on what the principle of causation is based4 ,an instance will help to make this point clear4 ,suppose that ,i am sitting in a room1 and look first at the door and then turn round and look at the window4 ,there are two successive acts of apprehending2 the content of the first is the door1 of the second1 the window1 but the succession1 ,i say1 is in my apprehending4 ,the door and the window have co-existed all the time4 ,suppose1 again1 that ,i look out of the window and see a cab in front of the house opposite1 come back into the room1 and then look out again and see the cab in front of a house further down4 ,here1 again1 are two successive acts of apprehending1 the content of the first houses with cab in front of one house1 of the second houses with cab in front of another4 ,this time ,i say the houses have gone on co-existing1 but the cab has moved4 ,the difference in what ,i see this time is due not to me1 but to the cab4 ,the succession is in the thing apprehended4 ,if we just think of the contents apprehended1 we have first ,a1 then ,b1 and say ,a and ,b co-exist in the first instance1 and have ,,cd and ,,ce1 and say ,d and ,e have been successive in the other4 ,why in the second case do we not say when we look out of the window the second time3 ,here is another row of houses1 which1 though they look exactly the same as the ones ,i saw last time1 have got the cab in a different place8 ,that is the land of thing one does say in a dream4 ,why would it be inadmissible in waking life8 ,let us first ask how we ever come to make the distinction between change in the content of our perception1 which is due to change in us1 and change in the things we perceive4 ,look out of a window into a busy street4 ,as we look certain things remain the same1 the houses opposite1 the lamp-posts1 and so on1 but other things change4 ,the permanence of part of the contents guarantees us that the change we perceive is not due to us3 if it were1 these would change also4 ,therefore it must be in certain of the things4 ,change is perceived against a background that is permanent and does not change4 ,but any such particular perception is1 of course1 very limited4 ,we do not see all the world at once1 and we only come to know a larger extent of reality by means of memory1 which enables us to put together what we see at one time with what we see at another4 ,we have got to try and understand how it is that we make this distinction1 which is clear to us in small isolated bits of experience1 hold of all experience4 ,now if reality did not change1 and we were conscious of our own movements1 we could go from one point to another of reality and back again1 and could be aware that the changes in our perception were all due1 not to change in reality1 but to us--were our history4 ,we should know that the different things we saw were co-existing all the time1 and we should1 in describing them1 try to describe them1 as in a map1 as we should perceive them if we saw them all at once4 ,the succession would be subjective1 the co-existence objective4 ,if we perceived nothing but change1 we should be incapable of distinguishing between our changes and the change outside us1 for all succession in our experiencing would be experience of what was successive1 and there could be no distinction between psychology and science4 ,our experience of reality is not like either of these suppositions1 but like both of them combined4 ,some succession of our experiencing is experience of the co-existing1 some experience of succession4 ,reality stretches out beyond us in space1 some of it changing and some of it permanent2 we cannot tell simply from the difference in what we perceive whether the difference comes from change in us or change in the thing4 ,we can tell that only on the assumption that we are having fragmentary views of a whole that is continuous4 ,the only continuity we know is the continuity of our own experience made possible by memory1 and we try to interpret that experience in the light of the larger continuity of the world which our experience breaks up4 ,as we go from one place to another1 notice now this thing1 now that1 we can test interpretations made on this assumption4 ,wrong interpretations are those which make our experience inconsistent4 ,if we thought that what happened at one time had no relation with what happened at another1 that anything might happen any time1 our experience and our own life would be the merest jumble4 ,our experience attains consistency only as we learn more and more to disentangle the differences in experience which come from our changes1 from the changes and the variety which are part of the whole connected system of reality1 of which we see now one fragment1 then another4 ,the distinction between succession in our apprehending and apprehension of succession1 which is the basis of all experience of change1 implies the recognition of change as not arbitrary but part of a connected system of reality4 ,as ,kant puts it in his formulation of the principle of the analogies of experience1 ,experience is only possible by means of the representation of a necessary connection of perceptions4 ,but if our perception of reality is fragmentary1 how can we think of reality as other than fragmentary1 how can we fill up the gaps8 ,only by thinking of the whole as a connected system in space and time4 ,for it is the nature of space and time that they can be thought of independently of the specific nature of the things in space and time1 and that the space and time we perceive in any one experience must be thought of as parts of an all-embracing space and an all-embracing time4 ,we cannot follow the whole history of a change from ,a to ,b1 we can only say that1 if our experience is to have any consistency1 we must think that the fact that we first saw ,a and then saw ,b implies in this case that the change from ,a to ,b is part of the continuous system of change in time1 that it is determined in time4 ,but to think of an event as determined in time is not to think of it as determined by time1 for time in itself could not produce one thing more than another4 ,it is to think of it as determined by the nature of what precedes it in time4 ,we therefore conclude that like causes have like effects2 for1 if anything could cause anything1 we should never know that change in what we observed was due to change in us--in the position of our bodies1 e4g4--and the experience of objective change would be impossible4 ,the principle does not tell us of itself what causes what4 ,that can only be discovered by empirical investigation4 ,that is necessary because we do not1 as we seem to have assumed above1 simply see one thing becoming another4 ,we see parts of all kinds of changes4 ,hence succession may be objective but not causal4 ,science has1 by observation and experiment1 to disentangle and isolate different changes1 but it could not do this without assuming the principle of causality4 ,causation1 then1 and the other assumptions of the physical sciences1 are shown by ,kant to be grounds of the possibility of experience4 ,we cannot deny them without denying elementary distinctions in our experience1 without which life would be a chaos1 and which are assumed and justified every moment4 ,while ,kant thus demonstrates the validity of such principles1 he is also insistent on the limitations of their application4 ,they are principles which give consistency to experience1 but must not be applied save in reference to what we experience4 ,they apply1 in his words1 only to phenomena4 ,the purport of this limitation can1 again1 be most easily seen by examining the principle of causality4 ,by means of that principle we connect one event with another1 but the reality is not two different but connected events1 but a continuous process4 ,the continuous process escapes us1 because our perception of it is fragmentary and discontinuous4 ,inasmuch as a judgment of causal connection asserts that the events we separately notice are connected1 it is true1 but it is false if taken to imply that reality consists of a series of discontinuous events or stages which are yet connected4 ,such an assumption would mean1 in ,kant's words1 that causation is applied not to phenomena 7things as they appear to us71 but to things in themselves 7things considered apart from the manner in which they appear to us74 ,if we realise its falsehood1 we can1 he thinks1 evade the contradictions which he examines in the ,dialectic4 99,,chapter ,v99 99,,the ,,antinomies ,,and ,,criticism ,,of ,,the ,,proofs ,,of ,,the ,,existence ,,of ,,god99 ,so far we have been considering the positive side of ,kant's argument1 his attempt to confirm the validity of the principles of science4 ,we must now notice the negative side1 his attempt to limit the application of these principles1 and his denial of the possibility of knowledge in certain spheres4 ,we saw that ,kant in his ,prolegomena summed up the argument of the three chief divisions of the ,critique as an answer to the questions3 ,how is mathematics possible8 ,how is pure science of nature possible8 and1 ,how is metaphysics possible8 ,he qualified the last question by adding as a natural disposition of the mind4 ,the argument of the ,dialectic is that metaphysics1 in the sense of inquiry into objects which transcend the bounds of experience1 is not possible as a science1 but that metaphysical questions arise naturally from the nature of human reason4 ,they cannot be answered4 ,all we can do is to see why we cannot answer them4 ,kant thought of knowledge as a process of extending the bounds of perception1 of piecing together the fragmentary glimpses we get of the world1 stretching them out in spatial and temporal determinations that go beyond what we have actually experienced1 connecting and linking up the events which we perceive discontinuously4 ,as science extends1 the range of our knowledge widens1 but the process of extension never reaches its completion4 ,there are always more facts to be discovered and explained4 ,science1 therefore1 can never rest content with its achievements1 but must always demand that the investigation of conditions should be pushed further back and on4 ,from this sense of the incompleteness of all actual knowledge1 and of all there is that might be but is not known1 arises what ,kant calls an ideal of reason1 a demand that1 in all investigation into the conditioned1 we should go on till we come to the totality of conditions4 ,this ideal he holds to be serviceable and necessary4 ,it has1 however1 a natural tendency to pass from an ideal to an idea1 and in so doing it gives rise to the contradictions with which the ,dialectic is concerned4 ,if all our investigation is governed by the thought that it must go on until it reaches completion1 we naturally speculate on the fulfilment of that ideal1 and try to form an idea of that totality of conditions1 of how we should think the world if we knew it in its completeness4 ,herein we hypostatize the ideal or make it an idea1 and we fall into contradiction2 for we cannot really know the whole without knowing all its parts4 ,if we give up the slow and never-completed process of knowing one part after another1 and try to jump to the idea of the whole1 we reach quite contrary results1 as we apply to the conception of the whole one or other of two assumptions implied in our investigation of the parts4 ,kant sharply distinguishes between the principles of the pure understanding and the ideas of reason4 ,the former are implied in all our knowledge1 and the fact that experience is not chaotic confirms them at every moment4 ,the second are ideals which guide knowledge1 but are never realised4 ,he calls them ideas of reason1 because it is the special task of reason to lay down rules for the proper and complete working of the understanding4 ,this task1 he thinks1 is exemplified in the logical nature of the syllogism which brings into unity the judgments of the understanding4 ,as he used the forms of judgment as a guiding thread to discover a complete list of categories of the understanding1 so he uses the forms of syllogism to discover a complete list of the ideas of reason4 ,in both cases ,kant's reference to logical forms is far-fetched4 ,actually the list in the ,dialectic seems to be influenced by a number of considerations not always consistent4 ,there are three main divisions of the ,dialectic4 7,the first ,kant calls the paralogisms of rational psychology47 ,all knowing and experience imply the unity of the self which knows4 ,in actual experience that unity is qualified by the nature of what it unites1 but we may try to think of it apart from and independent of this4 ,this leads to an attempt to know the self by asking what must be its nature if it has the unity implied in knowing1 and to argue that the soul is a substance and simple1 not affected by the changes in the matter which it knows and therefore immortal4 ,the second division arises from the fact that in knowledge we are concerned with series--a series of addings together and a series of divisions1 as of parts of space and time2 a series of things arising one from the other1 as in causation2 and a series of things in dependence one upon the other4 ,the ideas of reason come from the thought of these series completed1 and produce what ,kant calls antinomies4 ,for if we start with the thought that what we are trying to apprehend must be a whole1 we get one series of results2 if with the thought that we can only apprehend the whole by going from condition to condition indefinitely1 we get another4 ,kant distinguishes four antinomies1 each with thesis and antithesis4 ,the thesis of the first is1 ,the world has a beginning in time1 and is limited also in regard to space2 the antithesis1 ,the world has no beginning and no limits in space1 but is infinite1 in respect both to time and space4 ,the thesis of the second is1 ,every compound substance in the world consists of simple parts1 and nothing exists anywhere but the simple or what is composed of it2 the antithesis is the contrary of this4 ,the thesis of the third is1 ,causality1 according to the laws of nature1 is not the only causality from which all the phenomena of the world can be deduced4 ,in order to account for these phenomena it is necessary also to admit another causality1 that of freedom2 the antithesis1 ,there is no freedom1 but everything in the world takes place entirely according to the laws of nature4 ,the thesis of the fourth is1 ,there exists an absolutely necessary ,being belonging to the world1 either as a part or as a cause of it2 the antithesis is a denial of this4 ,the problems of the third division of the ,dialectic arises from an attempt to think of a whole which shall include both the known world and the mind that knows4 ,this attempt1 which ,kant calls the ideal of pure reason1 leads to proofs of the existence of ,god4 ,as the ,dialectic proceeds1 it becomes clear that ,kant has another list to hand4 ,he enumerates1 as the three great objects of metaphysical inquiry1 ,god1 ,freedom1 and immortality1 and in his discussion of the ideas of reason he treats them principally as attempts to give definite and dogmatic answers to the problems suggested by these three topics4 ,immortality is the subject of what ,kant calls the paralogisms of rational psychology4 ,he argues that all attempts to prove the immortality of the soul by a priori arguments involve an argument of this kind3 they begin by noting that death is always dissolution of some kind1 that1 therefore1 what is not made up of parts and cannot be dissolved1 cannot die4 ,then they urge that the soul is not made up of parts1 and therefore cannot die4 ,the fallacy in this argument is that it treats the unity of the self as though it were an object of knowledge4 ,we can show that knowledge is only possible if the self has a unity other than that of a spatial whole1 but we cannot therefore argue that it must be exactly like a spatial whole1 in the sense that death in it can only be brought about by dissolution1 but unlike a spatial whole in that in it there is nothing to be dissolved4 ,the real nature of the unity of the self1 ,kant argues1 cannot be known4 ,all we can do is to reject a priori arguments either for or against its immortality4 ,freedom is treated in the third antinomy of pure reason1 and to that ,kant devotes most attention1 but others of the antinomies are concerned with the difficulties arising from the application of spatial and temporal determinations to reality as a whole1 and to the category of necessity4 ,kant makes a distinction between the first two and the second two antinomies4 ,it is the first two that express the inadequacy of temporal or spatial determination to reality as a whole4 ,all such determination implies measurement1 and measurement is always a relation of part to part4 ,the antitheses of both antinomies express the inadequacy of any number to the expression of the nature of the whole1 the thesis the inadequacy of regarding reality as an aggregate or addition of any kind4 ,each is strong in what it denies1 and ,kant's solution is that both thesis and antithesis are false1 because you cannot apply spatial or temporal determination to the world as a whole4 ,in contrast the solution of the other antinomies is that both thesis and antithesis are true1 and that is possible because they are concerned with different things4 ,the third antinomy arises from the difficulty of applying the category of causation to the world as a whole4 ,the assumption underlying the thesis is not1 as is sometimes asserted1 merely that the notion of infinity in itself implies a contradiction1 but that a determinate result must have a determinate cause4 ,if we think of what actually exists now as having been caused by what has preceded it1 we must think of that which has had a determinate result being itself determinate4 ,it is the familiar argument for a first cause4 ,in causation we seem to be relating one event to another event1 and are really only putting the question of origination further back4 ,yet1 if we say that therefore we must suppose an absolute origination of change1 a beginning of the series1 we have to answer the question1 ,how is it possible to think of the originating number of the series8 ,for to think that something can arise from nothing is to contradict the principle of causation4 ,kant's solution to this difficulty is important1 for it had great influence upon his ethical theory4 ,the category of causation applies only to phenomena4 ,if we think of things as phenomena we must recognise that they are subject to the principle of causation2 if we think of them as things in themselves1 the category of causation does not apply to them1 and their action may be free4 ,the same action may therefore on its phenomenal side be determined1 and on its nominal side1 as the action of a thing in itself1 be free4 ,this may seem to be solving one contradiction by propounding another1 till we remember that in causation we do not explain the relation of cause to effect4 ,the relation we discover is between one instance of cause and effect and another4 ,like causes have like effects4 ,the principle applies1 then1 in so far as things are like one another4 ,it applies to changes which are aggregates or complexes of simpler changes which are like other changes4 ,if and in so far as there are things which are more than aggregates of their elements1 and are therefore unique1 there are things to whose changes no laws of cause and effect are adequate4 ,the point may be illustrated by the way we think about character4 ,if we think of a man's character as his characteristics1 his being this or that kind of person1 we must think of his action as so far determined1 but that does not prevent us from thinking of his individuality as something more than any sum or combination of characteristics1 as something essentially alive1 which escapes all attempts to bind it by rules4 ,it is the difference in ,kant's words between man regarded from the point of view of anthropology1 and man regarded as a responsible moral being4 ,we shall see in the next chapter that this distinction is the basis of ,kant's moral theory4 ,here it must be noted that he does not claim that his solution of the third antinomy proves the fact of freedom4 ,that1 he held1 no merely intellectual argument could prove4 ,it only defends the possibility of freedom4 ,the third division of the ,dialectic is an examination of the proofs of the existence of ,god4 ,when we study ,kant's account of them1 we find we are concerned not1 as elsewhere in the ,dialectic1 with a conflict springing from the nature of reason itself1 but with the relation of thought and conduct4 ,kant distinguishes three proofs of the existence of ,god--the ontological1 the cosmological1 and the physico-theological--but he maintains that the last two really rest upon and imply the first4 ,the first1 the ontological proof1 is the argument that the very conception of a perfect being implies existence4 ,it is the only proof of moral importance1 inasmuch as it attempts to argue a priori that a being of perfect morality must exist4 ,kant's answer to it is that1 to argue that we could not conceive a perfect being unless we conceived that being's existence1 is to suppose that to conceive of a thing1 and to conceive of the same thing existing1 is to conceive of different things4 ,existence1 he says1 adds nothing to the concept of an object4 ,kant's objection to the ontological proof has been criticised4 ,but the proof either assumes that ,god is a being independent of and separate from the rest of reality1 and then1 as ,kant says1 we may conceive ,god as existing1 but our conception not being necessitated1 carries no necessity with it4 7,if ,i conceive a hundred dollars to be in my pocket1 he says1 ,i conceive them to be there2 but that does not mean the dollars are there47 ,or if we say that reality must be thought of as existing1 the answer is1 ,yes1 but must reality necessarily be thought of as morally perfect8 ,it is this last assumption which alone makes the ontological proof worth proving2 for arguments about the existence or non-existence of ,god are mere quarrels about words1 except in so far as they are concerned with moral issues4 ,but moral issues cannot be solved by a consideration of purely intellectual assumptions4 ,the nature of the other two proofs of ,god's existence makes this clear4 ,the second1 the cosmological1 is the argument that if anything exists1 something must necessarily exist4 ,kant's answer is that this is sound so far as it goes1 but it does not prove that what necessarily exists is a morally perfect being4 ,the third1 the physico-theological argument1 is the familiar argument from design4 ,kant treats this argument with much greater respect than the other two1 but insists that we must see how far it will carry us4 ,if we are going to infer the nature of ,god from the nature of the world as we see it1 we must do so honestly4 ,but though we see design in the world1 we do not see perfection1 and on the basis of this argument we cannot ignore the imperfection and want of harmony which is as patent as the harmony and design4 ,kant's analysis of these proofs seems negative4 ,its real purport is to insist that religion cannot be dissociated from moral experience1 that the knowledge of ,god1 which is the concern of religion1 is not got by intellectual speculation1 but in the moral life4 ,when he said that he had limited reason to make room for faith1 he did not mean that men could not prove the existence of ,god1 but might believe in it if they pleased4 ,he meant that ,god is implied and known above all in moral action4 ,his criticism of these classical proofs is thus the beginning of that revivified philosophy of religion whose chief representatives have been ,schleiermacher and ,ritschl4 99,,chapter ,,vi99 99,,kant',s ,,moral ,,theory99 ,kant's moral theory is an integral part of his philosophical system4 ,if the ,critique of ,pure ,reason argues the impotence of reason in the sphere of speculation1 the ,critique of ,practical ,reason affirms its sovereignty in the sphere of practice4 ,the second ,critique is thus the complement of the first4 ,kant's treatment of moral problems being largely the consequence of the conclusions of the first ,critique1 his moral theory is thus mainly metaphysical4 ,the title of one of his works on moral theory1 ,fundamental ,principles of the ,metaphysic of ,morals1 bears this out4 ,there were1 no doubt1 other influences which had their effect on his conception of morality4 ,he tells us himself that he was inspired by the teaching of ,rousseau on the dignity and worth of man4 ,he was undoubtedly repelled into a reaction against the sentimental school of ,shaftesbury1 which in its ,german adherents insisted on the agreeable and gentlemanly nature of virtue with an almost sickly sentiment4 ,this reaction accounts for the extreme emphasis laid by ,kant on the divorce between duty and any kind of inclination4 ,but his doctrine as a whole can only be understood in the light of the conclusions of the first ,critique4 ,kant's conception of freedom or autonomy of the will is the key to his moral theory4 ,on the hypothesis of freedom of the will1 he says1 morality together with its principle follows from it by mere analysis of the conception4 ,we saw in the last chapter that ,kant regarded human action1 when looked at from an anthropological point of view1 as phenomenal1 and therefore subject to the law of cause and effect4 ,if we think of man as a creature of inclination1 with likes and dislikes1 we seem1 in considering men's differences from one another in this respect1 to be dealing with matters of fact over which men have no control4 ,we are born and grow up with different natures1 with the result that one man likes one thing1 another another2 one man's temptations do not tempt another1 what one man finds easy another finds difficult4 ,we seem here to be in a world where causation rules4 ,if men act differently1 it is because their external environment1 acting upon their different natures1 calls out different responses4 ,so far1 then1 says ,kant1 as men act according to inclination1 do things because they like doing them1 or avoid them because they dislike them1 their actions are what he calls heteronomous1 governed by laws over which they have no control4 ,we assume1 whenever we are trying to explain human actions1 that they are the result of the interaction of character and environment1 and are not to be praised or blamed but understood4 ,tout comprendre est tout pardonner4 ,but when we consider our moral judgments we seem to be in a different world1 for there are some actions which we think we or others ought to have done or ought not to have done1 and this obligation has nothing to do with our likes and dislikes4 ,if we look back upon a past action of our own1 we may see why we did it1 understand how the temptation to it appealed with peculiar strength to something in our nature1 yet nevertheless we may say that we ought not to have done it1 and with that judgment goes the conviction that we need not have done it4 ,the conception of what ought to be is on a different plane from the conception of what is1 and assumes a different kind of causality4 ,it assumes that1 when we are done with our analysis of character1 of a man's likes and dislikes and the effect of circumstances upon them1 we can still assume that it is in his power to do what he ought and to abstain from doing what he ought not4 ,we praise the first and blame the second1 whether in ourselves or others1 just because we assume1 over and above inclination and disinclination1 a possibility of acting or not acting as duty demands4 ,thus ,kant analyses the assumption of moral judgment4 ,but it is still no more than an assumption1 and he has to ask how it can be reconciled with the seemingly contradictory principle of causation4 ,the analysis of the third antinomy in the first ,critique1 as we saw1 prepared the way by maintaining that the same action might be phenomenally determined1 and free as the action of a thing in itself1 were there another form of causality--free causality or self-determination4 ,for the existence of such another form of causality the first ,critique offered no evidence4 ,kant's concern is to show that morality assumes it2 for the claim of duty is that a man should not act as a creature of inclination1 of likes and dislikes4 ,duty claims to cut across all such empirical considerations4 ,the motive to do what duty demands must come from elsewhere4 ,it may then be found to be a claim that man should act not as a part of the physical world1 but as a moral being4 ,for man1 as well as an observer and understander of other men1 is also a moral agent4 ,as such he stands in quite different relations to other men4 ,he treats them and himself as moral agents1 responsible for their actions4 ,as a member of the world of moral relations he acknowledges a system of rights and duties1 he holds himself responsible to other men as they are responsible to him1 and all this has nothing to do with what a man wants or does not want to do1 with how easy or how difficult he may find it to perform what duty demands4 ,in this he is assuming in himself and other men a power of determining the will in accordance with the moral law4 ,that1 just because it takes no account of likes and dislikes1 cannot be derived from these or from considerations of circumstances or environment4 ,it must be deducible from the nature of man as a moral being4 ,in obeying the moral law1 then1 man will be obeying a law that comes from himself4 ,his will will be self-legislative4 ,this power of acting in accordance with a law that comes from the nature of man as a rational1 responsible being1 and not as a member of the world of causes and effects1 is moral freedom2 it is the assumption of all moral judgment and action4 ,it cannot1 ,kant holds1 be explained4 ,for all explanation is the work of the understanding1 and that can explain only phenomena4 ,it is enough that the first ,critique has shown that phenomenal causality is not inconsistent with the possibility of another causality4 ,in the moral sphere we act and judge as if we were free4 ,the moral law and duty make claims upon us on the same assumption4 ,moral freedom1 then1 is the ground of the possibility of moral experience4 ,kant's account of duty is determined by the sharp separation which he makes of man as moral agent and man regarded from the point of view of anthropology4 ,the commands of duty must be derived solely from the nature of man as a moral agent4 ,if they were the consequence of man's empirical nature or his surroundings1 they would have no claim to override his promptings of inclination or pleasure4 ,he describes these commands as categorical1 and the principle of morality as a categorical imperative4 ,the meaning of this phrase lies in its opposition to hypothetical4 ,many commands and principles are1 ,kant says1 hypothetical4 ,they assume that men desire certain ends1 happiness or health or success1 and the actions they advise are advised as means to such ends4 ,the law of morality is quite different from such prudential maxims4 ,it does not say1 ,if you want to be happy or to save your soul1 then act thus and thus4 ,its commands are absolute1 for they appeal to man simply as a rational being4 ,they must therefore be derived solely from a consideration of man's rationality4 ,it is difficult at first sight to see how any commands can be deduced from a consideration so abstract4 ,how1 we might say1 can man's rationality be known and recognised except in the content of what he does and thinks8 ,kant seeks to derive his imperative from the contrast between acting as a moral agent and following inclination4 ,man regards himself as a moral agent1 morally responsible for his conduct1 and he regards others as morally responsible1 whatever his or their particular nature or character may be4 ,that means that he must act as he thinks any one else would be bound to act1 and from this ,kant deduces his formulation of the categorical imperative3 ,act only according to that maxim which you can at the same time will to be a universal law4 ,another formula indicates more clearly the relation of duty to a society of moral agents responsible to one another3 ,act so that you treat humanity1 in your person and in the person of every one else1 always as an end as well as a means1 never merely as a means4 ,it is only by following such imperatives that we can rise above the promptings of circumstance1 for only thus is the will self-legislative4 ,in obeying such an imperative our will is self-determined1 for it is following a principle that is derived from man's nature as independent and transcendent of the world of phenomena4 ,hence in moral action we are in contact with the reality of things more truly than in any understanding of phenomena4 ,the moral law has a dignity which no natural inclinations or likings can have1 and the good-will1 the will which follows such a law1 has a similar worth and dignity4 ,there is nothing in the world--nay1 even beyond the world--nothing conceivable1 which can be regarded as good without qualification1 saving alone a good will4 ,such in outline is ,kant's account of morality4 ,a discussion of some of the difficulties which a consideration of it suggests may help to make its purport more clear4 ,kant holds that the principles of right action can be deduced directly from the imperative he has formulated1 and need take therefore no account of historical circumstance4 ,now1 it is easy to show that1 when we do an action which we know to be wrong1 we are making an exception in our own favour4 ,we cannot universalise the maxim of our own conduct4 ,when we do what we know to be wrong1 we recognise what is right4 ,we say1 ,this is how any one ought to act in these circumstances1 but ,i am not going to do it4 ,we must learn to look upon ourselves as we should look upon and judge any other moral agent4 ,if1 when taxed with wrongdoing1 we reply1 ,i wanted to do it1 or ,that is the kind of person ,i am1 or ,that is the way ,i am made1 we are abandoning the moral position1 and the answer is1 ,whether you wanted it or not1 you ought not to have done it1 or1 ,well1 you ought to become different4 ,but this does not help us when1 looking at actions from a moral standpoint1 it is difficult to say what ought to be done4 ,kant tries to show that wrong action1 if universalised1 is always contradictory4 ,he takes the instance of telling a lie4 ,if that were universal no one would believe any one else1 and there would be no point in telling a lie4 ,lying is essentially parasitical4 ,but this does not help us in the familiar problem in casuistry1 whether it is allowable to tell a lie to save life4 ,for here we have a conflict between two maxims1 both of which can be universalised4 ,we cannot regard such a situation as simply involving a question of telling the truth or of saving life4 ,we must consider the circumstances of the case4 ,this is even more evident if we apply ,kant's rule to the question of whether celibacy is ever justified4 ,if celibacy were universal1 there would soon be nobody to be celibate1 but it does not therefore follow that some people under certain circumstances ought not to be celibate4 ,the question cannot be answered without reference to circumstances4 ,the moral of this is that the categorical imperative does not enable us to act without individual moral judgment in individual cases4 ,further1 in one of the instances which ,kant gives he admits that there are certain ways of action which might be universalised1 but which he nevertheless holds to be wrong4 ,he instances the duty of being industrious4 ,a society could quite well be imagined in which every one was lazy1 but he says1 ,it cannot be willed4 ,the ultimate appeal here is to what the moral reason wills4 ,that means that we must admit that the moral reason or moral judgment has a content not derivable simply from the conception of the moral law2 that there are certain kinds of life1 certain kinds of action1 which we judge to be good1 and others which we judge to be bad4 ,but1 if this is so1 we must give up the sharp separation ,kant makes between the moral law and nature1 and allow that things in nature can have a moral value4 ,it may still be true that they only have moral value through their relation to a good will1 and have no moral significance apart from such a relation4 ,the difficulties created by ,kant's sharp separation of the moral and the phenomenal worlds are equally apparent in his discussion of motives4 ,he conceives the individual as phenomenal1 to be determined solely by pleasure and pain4 ,the power of the moral law is manifest1 therefore1 when its commands run counter to inclination1 and the motive of respect for the moral law conquers inclination4 ,it is true to say that a man's likes and dislikes in themselves are not to the point when we are asking what he ought to do1 but ,kant sometimes speaks as though there could be no moral value in an action which did not go against inclination4 ,this is perilously near that morbid theory of conscience which assumes that the fact that an action would be very disagreeable to the agent is itself proof that the proposal to perform it is the voice of conscience4 ,here again we have to say that the fact that inclinations viewed merely as inclinations have no moral value1 does not show that1 relatively to the good will1 one may not be better than another4 ,there is nothing to be proud of in the fact that we dislike doing our duty4 ,this sharp separation between the world of morality and science was somewhat tempered in ,kant's third ,critique1 which we shall examine in the next chapter4 99,,chapter ,,vii99 99,,the ,,critique ,,of ,,judgment--,,aesthetics ,,and ,,teleology99 ,the ,critique of ,judgment is at once the most interesting and the most difficult of ,kant's three ,critiques4 ,it seems to cover a much wider ground than either of the two earlier ,critiques4 ,it concerns itself with the relation of empirical investigation to the a priori principles of understanding discussed in the first ,critique1 with an attempt to bridge the gulf between the world of freedom and the world of nature as described in the second ,critique1 with a discussion of the principles of aesthetics and of the conflict between the rival claims of the principles of mechanism and teleology1 a conflict which1 since the discoveries of ,darwin and the increasing interest taken in biology1 is becoming every day more important4 ,on all these points ,kant has much of importance to say4 ,modern theories of aesthetic are mainly based on an acceptance of the distinctions which he first laid down clearly4 ,much modern philosophy of a type which is little in sympathy with the doctrines of the first ,critique--,pragmatism1 for example--is an elaboration of his account of the regulative principles which guide empirical investigation1 while speculation on the rival methods of biology has hardly advanced beyond the solution suggested by ,kant4 ,yet the very suggestiveness of this book makes it hard to understand4 ,it is difficult to see the connection which ,kant supposed to exist between these very various problems4 ,the form of the book1 like the form of the first ,critique1 is marked by subdivisions suggested by formal logic1 which seem to have little or no connection with the subjects discussed under them1 so that the whole is a curious combination of formal system and discursive content4 ,kant himself regarded this ,critique as the triumphant vindication of his whole system1 in that it brought together and reconciled subjects which he had previously distinguished too sharply4 ,many later writers have thought rather that in it the inconsistencies which they believe to exist in ,kant's thought come to a head4 ,we have not space here to vindicate the ,critique of ,judgment as the crowning phase of the critical philosophy1 as a recent writer has called it1 or to examine singly ,kant's treatment of the various subjects of interest with which it is concerned4 ,it is important1 however1 to follow the connection which ,kant supposed to exist between these different subjects4 ,if we can understand that1 we shall gain considerable insight into ,kant's system as a whole4 ,kant names the book the ,critique of ,judgment1 or1 more exactly1 the ,critique of the ,faculty of ,judgment4 ,judgment is distinguished from understanding1 whose principles are more peculiarly the subject of the first ,critique4 ,the understanding1 according to ,kant1 is the faculty of rules4 ,judgment is shown in the application of rules to individual instances4 ,it is the element of individuality and spontaneity in all thinking1 for which no rules can be discovered4 ,judgment cannot be taught1 different men possess it in different degrees2 it is akin to genius4 ,when1 then1 ,kant turns to examine the faculty of judgment1 he is asking whether the mind1 in dealing with individuals in all their variety and difference1 and in attempting to understand them1 is guided by any general rules or principles4 ,the import of this question becomes clear in his relation of it to the familiar question of causation4 ,the principle of causation1 as we have seen1 is1 according to ,kant1 an a priori principle of the understanding1 and is assumed in all experience2 but it does not of itself enable us to determine in any particular case what causes what4 ,that is the task of empirical investigation1 and needs1 as we know1 the imagination and insight of the individual investigator2 in ,kantian language1 it is the work of the faculty of judgment4 ,besides the a priori principle of causation1 therefore1 we have an indefinite number of empirical causal laws4 ,kant asks whether the scientist in investigating such laws1 and more particularly in considering their relation to one another1 is guided by any principles4 ,he finds that the scientist assumes that this indefinite variety is capable of being reduced to some kind of unity1 assumes that there is continuity in nature1 that knowledge will not remain an aggregate of disconnected rules4 ,chemistry1 for example1 has discovered that the overwhelming variety of natural changes can be reduced to the action and interaction of a small number of elements4 ,the chemist proposes to go on and see whether the different elements may not themselves be seen to be forms of one substance4 ,these assumptions are1 according to ,kant1 quite different from the principles of the understanding4 ,for the latter are grounds of the possibility of experience4 ,we cannot deny them without making experience unmeaning4 ,this cannot be said of the former4 ,it obviously cannot be essential to experience that the multiplicity of the laws of nature should be reducible to unity1 for such unity has never been discovered4 ,experience has been quite possible without it4 ,this distinction between two kinds of principles ,kant expresses by calling those with which we are now concerned regulative4 ,the purpose they serve is the regulation and improvement of knowledge4 ,they do not1 like the principles of the understanding1 prescribe to nature4 ,we assume in them that nature is1 in ,kant's words1 purposive to the understanding--that is1 we first think out what order of nature would be intelligible1 and then look to see whether we cannot discover in nature such an order4 ,this assumption does not prove that there is any such order1 but in science we act as if it were there to be found out4 ,this suggestion of ,kant's has been elaborated in many modern writers on philosophy1 who have pointed out how much scientific method is governed by the notion of the most easily intelligible theory1 and they have argued that science assumes1 for the convenience of method1 principles which it never completely proves4 ,these principles are called sometimes methodological assumptions1 sometimes postulates4 ,the difference between such modern writers and ,kant is that the former think that all a priori principles are of this nature1 and that the principle of causation1 for example1 is itself only a postulate4 ,the faculty of judgment1 then1 according to ,kant1 assumes for regulative purposes that nature is purposive to our understanding4 ,what does this last phrase mean8 ,we are often concerned to know the relation of things to our purposes4 ,it has been pointed out that very many of our empirical concepts represent rather our practical interest in things than our desire to understand them as they are4 ,kant's phrase implies that1 apart from any such relation to particular purposes1 there is a more general purpose of mere intelligibility1 which some objects obviously serve more than others4 ,here we pass to the consideration of art1 for in our judgments of beauty ,kant holds that we similarly disregard the relation of the beautiful object to any particular purpose1 and seem to be concerned with general purposiveness4 ,the judgment of beauty is1 for ,kant1 the supreme act of the faculty of judgment4 ,it is reflection on an individual for its own sake1 without attempting to fit it to our desires or see it as an instance of our concepts or rules4 ,kant therefore proceeds to examine our judgments of beauty1 which show how reflection on individual objects may display general rules1 and then proceeds1 in the last part of the ,critique1 to discuss the part played by the concept of purposiveness in our understanding of nature4 ,it would seem at first sight that ,kant is not interested in art for its own sake1 but for the light which it throws upon the nature of our intellectual faculties4 ,nevertheless he is careful to insist on the distinction between artistic and scientific judgments4 ,the judgment of beauty1 he insists1 is free1 is not determined by a concept4 ,we are not concerned1 in such judgments1 with asking what an object is4 ,in so far as1 in our appreciation of beauty1 we bring in such considerations we are wrong4 ,he therefore rules out any theory that beauty is concerned with faithful representation4 ,beauty consists in the form of an object1 and in nothing else4 ,the judgment of beauty1 besides being free1 is also disinterested4 ,the relation of the beautiful object to our purposes is irrelevant to its beauty4 ,the judgment of beauty cannot1 therefore1 be determined by rules of any kind4 ,it is always individual and immediate1 and the immediate feeling of beauty counts for more than any rules or canons of taste4 ,kant therefore vindicates art as independent of either science or morality4 ,yet1 once we realise its independence1 the nature of art throws light upon both science and morality2 for the judgment of beauty1 although free and not determined by concepts1 claims universal validity4 ,we might put ,kant's point in another way by saying that art is significant1 and yet is not significant of anything in particular4 ,its meaning cannot be reduced to scientific statement nor abstracted from its form1 and yet art has meaning4 ,kant finds the explanation of the fact that the judgment of beauty is free1 and yet claims universal validity1 in the suggestion that a beautiful object is one the contemplation of which arouses and enlivens the two faculties of the intelligence1 the imagination and the understanding1 in their proper proportion or harmony4 ,all knowledge needs imagination1 the power of seeing resemblances and differences in objects1 and understanding which by concepts gives unity and rules to the imagination4 ,in science the imagination is subordinate to the understanding1 for the aim of science is definiteness and precision4 ,in art the imagination is free1 and yet art is not the mere seeing of resemblances and differences2 it also has its unity4 ,it aims at the best proportion of variety and unity4 ,this is independent of the varying natures of individual persons1 and therefore the judgment of beauty can claim to be universally valid4 ,beautiful objects1 then1 are purposive to the understanding1 inasmuch as their form stimulates in the most harmonious degree the two faculties of intelligence1 and in art we find proof that there is a principle of general intelligibility1 which may guide the work of the scientist4 ,the purpose of the scientist is quite different from that of the artist1 but if he is to reduce his facts to order and intelligibility he must be guided by a principle which is seen in its pure form in the artist4 ,in the second place1 an understanding of the nature of art has significance for moral theory1 because the judgment of beauty is disinterested1 and shows that pleasure may be independent of desire4 ,in aesthetic pleasure we are not merely determined by our inclinations1 for art is of all human activities free and creative4 ,we enjoy art not because it serves any of our individual desires and purposes1 it is enjoyed by something in us that is universal4 ,art1 then1 contradicts the position which ,kant assumes in the second ,critique1 that we cannot follow pleasure without being slaves of our phenomenal nature4 ,it is a disinterested enjoyment1 and is witness to the possibility of disinterested pleasure in the good4 ,further1 ,kant held that in one kind of aesthetic enjoyment1 appreciation of the sublime1 the contrast between our weakness and the vast extent and overwhelming powers of nature1 calls forth in us a conviction accompanied by pleasure of the yet greater might of the moral law within us4 ,art therefore may become the symbol of morality1 and the third ,critique does much to soften the rigour of the teaching of the second4 ,in the last part of the ,critique of ,judgment ,kant applies his doctrine of regulative principles to the understanding of nature4 ,the faculty of judgment1 as we saw1 is concerned with the attempt to give unity to the detail of the natural world4 ,in this work it has two regulative principles1 mechanism and teleology4 ,reality cannot be formed according to both these principles2 for mechanism assumes that reality can be regarded as a pattern or complex of recurring or interchangeable parts whose changes are necessitated1 teleology that the world cannot be explained without supposing purpose to be an operating agency in change4 ,mechanism seeks to explain things as the necessary result of their original condition1 teleology in the light of their highest development4 ,the two principles have therefore been held to be inconsistent4 ,the scientist1 jealous for the validity of his discovery of mechanism1 combats the very notion of purposive agency4 ,the theologian thinks that to admit mechanism anywhere is to give up his whole position4 ,kant's solution of this antinomy is that both mechanism and teleology are only regulative principles4 ,they tell us nothing of the ultimate nature of reality1 except that we can explain much of it by regarding it as if it were a machine1 and much by regarding it as if it were the field of purposive agency4 ,reality must be consistent with both these facts1 but more we cannot say4 ,the moral is that we should continue to treat them as regulative principles1 and push each principle of explanation as far as it will go4 ,kant is here1 as usual1 the enemy alike of scientific and of theological dogmatism4 ,he will not allow any limit to be set to the work of scientific investigation1 and yet will not allow a principle of scientific method to be converted from an explanation of perceived facts into a theory of the universe4 ,besides mediating between the conflicting claims of mechanism and teleology1 ,kant also modifies the notion of teleology4 ,when we think of reality as purposive1 we do not necessarily think of it as having a definite purpose1 as being subordinate1 for example1 to the well-being of man4 ,the principle of purposiveness arises properly1 he holds1 from the contemplation of living things1 from the perception of the difference between an organism and a machine4 ,an organism is purposive in the sense in which a work of art is4 ,in applying the principle we are trying to understand reality as though the relation of all the different things in it were like the relation of the parts of an organism or a picture4 ,but this principle1 like the principle of mechanism1 does not carry us further than the facts we have examined1 for an organism or a work of art can only be understood by study of the individual relations of all its parts4 ,we can never know the universe as an organism1 for we can never know all its parts4 ,we can understand and put together more and more of them1 but we never come to the end4 ,the third ,critique1 then1 enforces the lesson of the first1 that knowledge is the work of individual finite minds1 trying to understand elements in a whole that transcends the limits of their experience1 pushing back the spatial and temporal limits which confine each individual1 but never removing them altogether4 ,the critical philosophy teaches the impossibility of absolute knowledge1 but it does so not by suggesting general scepticism of all knowledge1 but by enforcing the validity of scientific knowledge within its own limits4 99,,bibliography99 99,,translations99 ,there are two accessible translations of the ,critique of ,pure ,reason--,meiklejohn 7,bell ,co47 and ,max ,mueller 7,macmillan74 ,kant's ethical writings have been translated by ,abbott 7,longmans74 ,there is a translation of the ,critique of ,pure ,reason by ,bernard 7,macmillan71 and of the first part of it1 the ,critique of ,a,esthetic ,judgment1 by ,meredith 7,clarendon ,press74 ,this last book has introductory essays and notes4 ,the student beginning the study of ,kant will find ,watson's ,selections from ,kant 7,mac,lehose ,sons7 useful if he cannot read the ,critiques in full4 99,,commentaries99 ,the most useful small books on ,kant are ,adamson1 ,the ,philosophy of ,kant 7,blackwood71 and ,watson1 ,the ,philosophy of ,kant ,explained 7,mac,lehose74 ,the best and most thorough work on ,kant in ,english is ,caird1 ,the ,critical ,philosophy of ,kant1 #b vols4 7,mac,lehose74 ,,printed ,,in ,,great ,,britain