in this regard might need correction will correct itself in the mind of the reader with the help of the second volume. Both volumes have, in the full sense of the word, a supplementary relation to each other, so far as this rests on the fact that one age of human life is, intellectually, the supplement of another. It will therefore be found, not only that each volume contains what the other lacks, but that the merits of the one consist peculiarly in that which is wanting in the other. Thus, if the first half of my work surpasses the second in what can only be supplied by the fire of youth and the energy of first conceptions, the second will surpass the first by the ripeness and complete elaboration of the thought which can only belong to the fruit of the labour of a long life. For when I had the strength originally to grasp the fundamental thought of my system, to follow it at once into its four branches, to return from them to the unity of their origin, and then to explain the whole distinctly, I could not yet be in a position to work out all the branches of the system with the fulness, thoroughness, and elaborateness which is only reached by the meditation of many years – meditation which is required to test and illustrate the system by innumerable facts, to support it by the most different kinds of proof, to throw light on it from all sides, and then to place the different points of view boldly in contrast, to separate thoroughly the multifarious materials, and present them in a well-arranged whole. Therefore, although it would, no doubt, have been more agreeable to the reader to have my whole work in one piece, instead of consisting, as it now does, of two halves, which must be combined in using them, he must reflect that this would have demanded that I should accomplish at one period of life what it is only possible to accomplish in two, for I would have had to possess the qualities at one period of life that nature has divided between two quite different ones. Hence the necessity of presenting my work in two halves supplementary to each other may be compared to the necessity in consequence of which a chromatic object-glass, which cannot be made out of one piece, is produced by joining together a convex lens of flint glass and a concave lens of crown glass, the combined effect of which is what was sought. Yet, on the other hand, the reader will find some compensation for the inconvenience of using two volumes at once, in the variety and the relief which is afforded by the handling of the same subject, by the same mind, in the same spirit, but in very different years. However, it is very advisable that those who are not yet acquainted with my philosophy should first of all read the first volume without using the supplementary books, and should make use of these only on a second perusal; otherwise it would be too difficult for them to grasp the system in its connection. For it is only thus explained in the first volume, while the second is devoted to a more detailed investigation and a complete development of the individual doctrines. Even those who should not make up their minds to a second reading of the first volume had better not read the second volume till after the first, and then for itself, in the ordinary sequence of its chapters, which, at any rate, stand in some kind of connection, though a somewhat looser one, the gaps of which they will fully supply by the recollection of the first volume, if they have thoroughly comprehended it. Besides, they will find everywhere the reference to the corresponding passages of the first volume, the paragraphs of which I have numbered in the second edition for this purpose, though in the first edition they were only divided by lines.
I have already explained in the preface to the first edition, that my philosophy is founded on that of Kant, and therefore presupposes a thorough knowledge of it. I repeat this here. For Kant's teaching produces in the mind of every one who has comprehended it a fundamental change which is so great that it may be regarded as an intellectual new-birth. It alone is able really to remove the inborn realism which proceeds from the original character of the intellect, which neither Berkeley nor Malebranche succeed in doing, for they remain too much in the universal, while Kant goes into the particular, and indeed in a way that is quite unexampled both before and after him, and which has quite a peculiar, and, we might say, immediate effect upon the mind in consequence of which it undergoes a complete undeception, and forthwith looks at all things in another light. Only in this way can any one become susceptible to the more positive expositions which I have to give. On the other hand, he who has not mastered the Kantian philosophy, whatever else he may have studied, is, as it were, in a state of innocence; that is to say, he remains in the grasp of that natural and childish realism in which we are all born, and which fits us for everything possible, with the single exception of philosophy. Such a man then stands to the man who knows the Kantian philosophy as a minor to a man of full age. That this truth should nowadays sound paradoxical, which would not have been the case in the first thirty years after the appearance of the Critique of Reason, is due to the fact that a generation has grown up that does not know Kant properly, because it has never heard more of him than a hasty, impatient lecture, or an account at second-hand; and this again is due to the fact that in consequence of bad guidance, this generation has wasted its time with the philosophemes of vulgar, uncalled men, or even of bombastic sophists, which are unwarrantably commended to it. Hence the confusion of fundamental conceptions, and in general the unspeakable crudeness and awkwardness that appears from under the covering of affectation and pretentiousness in the philosophical attempts of the generation thus brought up. But whoever thinks he can learn Kant's philosophy from the exposition of others makes a terrible mistake. Nay, rather I must earnestly warn against such accounts, especially the more recent ones; and indeed in the years just past I have met with expositions of the Kantian philosophy in the writings of the Hegelians which actually reach the incredible. How should the minds that in the freshness of youth have been strained and ruined by the nonsense of Hegelism, be still capable of following Kant's profound investigations? They are early accustomed to take the hollowest jingle of words for philosophical thoughts, the most miserable sophisms for acuteness, and silly conceits for dialectic, and their minds are disorganised through the admission of mad combinations of words to which the mind torments and exhausts itself in vain to attach some thought. No Critique of Reason can avail them, no philosophy, they need a medicina mentis, first as a sort of purgative, un petit cours de senscommunologie, and then one must further see whether, in their case, there can even be any talk of philosophy. The Kantian doctrine then will be sought for in vain anywhere else but in Kant's own works; but these are throughout instructive, even where he errs, even where he fails. In consequence of his originality, it holds good of him in the highest degree, as indeed of all true philosophers, that one can only come to know them from their own works, not from the accounts of others. For the thoughts of any extraordinary intellect cannot stand being filtered through the vulgar mind. Born behind the broad, high, finely-arched brow, from under which shine beaming eyes, they lose all power and life, and appear no longer like themselves, when removed to the narrow lodging and low roofing of the confined, contracted, thick-walled skull from which dull glances steal directed to personal ends. Indeed we may say that minds of this kind act like an uneven glass, in which everything is twisted and distorted, loses the regularity of its beauty, and becomes a caricature. Only from their authors themselves can we receive philosophical thoughts; therefore whoever feels himself drawn to philosophy must himself seek out its immortal teachers in the still sanctuary of their works. The principal chapters of any one of these true philosophers will afford a thousand times more insight into their doctrines than the heavy and distorted accounts of them that everyday men produce, who are still for the most part deeply entangled in the fashionable philosophy of the time, or in the sentiments of their own minds. But it is astonishing how decidedly the public seizes by preference on these expositions at second-hand. It seems really as if elective affinities were at work here, by virtue of which the common nature is drawn to its like, and therefore will rather hear what a great man has said from one of its own kind. Perhaps this rests on the same principle as that of mutual instruction, according to which children learn best from children.
One word more for the professors of philosophy. I have always been compelled to admire not merely the sagacity, the true and fine tact with which, immediately on its appearance, they recognised my philosophy as something altogether different from and indeed dangerous to their own attempts, or, in popular language, something that would not suit their turn; but also the sure and astute policy by virtue of which they at once discovered the proper procedure with regard to it, the complete harmony with which they applied it, and the persistency with which they have remained faithful to it. This procedure, which further commended itself by the great ease of carrying it out, consists, as is well known, in altogether ignoring and thus in secreting – according to Goethe's malicious phrase, which just means the appropriating of what
