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