5
" The purpose of this critique of pure speculative reason consists in the attempt to change the old procedure of metaphysics, and to bring about a complete revolution after the example set by geometers and investigators of nature. This critique is a treatise on the method, not a system of the science itself; but nevertheless it marks out the whole plan of this science, both with regard to its limits and with regard to its inner organization. For it is peculiar to pure speculative reason that it is able, indeed bound, to measure its own powers according to the different ways in which it chooses its objects for thought, and to enumerate exhaustively the different ways of choosing its problems, thus tracing a complete outline of a system of metaphysics. This is due to the fact that, with regard to the first point, nothing can be attributed to objects in *a priori* knowledge, except what the thinking subject takes from within itself; while, with regard to the second point, pure reason, as far as its principles of knowledge are concerned, forms a separate and independent unity, in which, as in an organized body, every member exists for the sake of all the others, and all the others exist for the sake of the one, so that no principle can be safely applied in *one* relation unless it has been carefully examined in *all* its relations to the whole use of pure reason. Hence, too, metaphysics has this singular advantage, an advantage which cannot be shared by any other rational science which has to deal with objects (for *logic* deals only with the form of thought in general), that if by means of this critique it has been set upon the secure course of a science, it can exhaustively grasp the entire field of knowledge pertaining to it, and can thus finish its work and leave it to posterity as a capital that can never be added to, because it has to deal only with principles and with the limitations of their use, as determined by these principles themselves. And this completeness becomes indeed an obligation if metaphysics is to be a fundamental science, of which we must be able to say, *nil actum reputants, si quid superesset agendum* [to think that nothing was done for as long as something remained to be done]." ―from_Critique of Pure Reason_. Preface to the Second Edition. Translated, edited, and with an Introduction by Marcus Weigelt, based on the translation by Max Müller, pp. 21-22 "
6
" I examined the poets, and I look on them as people whose talent overawes both themselves and others, people who present themselves as wise men and are taken as such, when they are nothing of the sort.
From poets, I moved to artists. No one was more ignorant about the arts than I; no one was more convinced that artists possessed really beautiful secrets. However, I noticed that their condition was no better than that of the poets and that both of them have the same misconceptions. Because the most skillful among them excel in their specialty, they look upon themselves as the wisest of men. In my eyes, this presumption completely tarnished their knowledge. As a result, putting myself in the place of the oracle and asking myself what I would prefer to be — what I was or what they were, to know what they have learned or to know that I know nothing — I replied to myself and to the god: I wish to remain who I am.
We do not know — neither the sophists, nor the orators, nor the artists, nor I— what the True, the Good, and the Beautiful are. But there is this difference between us: although these people know nothing, they all believe they know something; whereas, I, if I know nothing, at least have no doubts about it. As a result, all this superiority in wisdom which the oracle has attributed to me reduces itself to the single point that I am strongly convinced that I am ignorant of what I do not know. "
― Socrates
17
" I remember one incident which bears upon this part of the treatise. The gentleman who gave it to me had asked to see my tobacco-pipe; he examined it carefully, and when he came to the little protuberance at the bottom of the bowl he seemed much delighted, and exclaimed that it must be rudimentary. I asked him what he meant." Sir," he answered, " this organ is identical with the rim at the bottom of a cup; it is but another form of the same function. Its purposes must have been to keep the heat of the pipe from marking the table upon which it rested. You would find, if you were to look up the history of tobacco-pipes, that in early specimens this protuberance was of a different shape to what it is now. It will have been broad at the bottom, and flat, so that while the pipe was being smoked the bowl might rest upon the table without marking it. Use and disuse must have come into play and reduced the function its present rudimentary condition. I should not be surprised, sir," he continued, " if, in the course of time, it were to become modified still farther, and to assume the form of an ornamental leaf or scroll, or even a butterfly, while in some cases, it will become extinct. "