While to Wolff thought as thought was merely positive self-identity and grasped itself as such, we saw the negative self-moving thought, the absolute Notion, appear in all its power in France; and in the Aufkl?rung it likewise made its way to Germany in such a manner that all existence, all action, was called upon to serve a useful purpose, i.e. the implicit was done away with and everything had to be for another; and that for which everything had to be is man, self-consciousness, taken, however, as signifying all men generally. The consciousness of this action in abstract form is the Kantian philosophy. It is thus the self-thinking absolute Notion that passes into itself which we see making its appearance in Germany through this philosophy, in such a way that all reality falls within self-consciousness; it is the idealism which vindicates all moments of the implicit to self-consciousness, but which at first itself remains subject to a contradiction, inasmuch as it still separates this implicit from itself. In other words the Kantian philosophy no doubt leads reality back to self-consciousness, but it can supply no reality to this essence of self-consciousness, or to this pure self-consciousness, nor can it demonstrate Being in the same. It apprehends simple thought as having difference in itself, but does not yet apprehend that all reality rests on this difference; it does not know how to obtain mastery over the individuality of self-consciousness, and although it describes reason very well, it does this in an unthinking empiric way which again robs it of the truth it has. Theoretically the Kantian philosophy is the “Illumination” or Aufkl?rung reduced to method; it states that nothing true can be known, but only the phenomenal; it leads knowledge into consciousness and self-consciousness, but from this standpoint maintains it to be a subjective and finite knowledge. Thus although it deals with the infinite Idea, expressing its formal categories and arriving at its concrete claims, it yet again denies this to be the truth, making it a simple subjective, because it has once for all accepted finite knowledge as the fixed and ultimate standpoint. This philosophy made an end of the metaphysic of the understanding as an objective dogmatism, but in fact it merely transformed it into a subjective dogmatism, i.e. into a consciousness in which these same finite determinations of the understanding persist, and the question of what is true in and for itself has been abandoned. Its study is made difficult by its diffuseness and prolixity, and by the peculiar terminology found in it. Nevertheless this diffuseness has one advantage, that inasmuch as the same thing is often repeated, the main points are kept before us, and those cannot easily be lost from view.
We shall endeavour to trace the lines which Kant pursued. The philosophy of Kant has in the first place a direct relation to that of Hume as stated above (p. 370). That is to say, the significance of the Kantian philosophy, generally expressed, is from the very beginning to allow that determinations such as those of universality and necessity are not to be met with in perception, and this Hume has already shown in relation to Locke. But while Hume attacks the universality and necessity of the categories generally, and Jacobi their finitude, Kant merely argues against their objectivity in so far as they are present in external things themselves, while maintaining them to be objective in the sense of holding good as universal and necessary, as they do, for instance, in mathematics and natural science.(1) The fact that we crave for universality and necessity as that which first constitutes the objective, Kant thus undoubtedly allows. But if universality and necessity do not exist in external things, the question arises “Where are they to be found?” To this Kant, as against Hume, maintains that they must be a priori, i.e. that they must rest on reason itself, and on thought as self-conscious reason; their source is the subject, “I” in my self-consciousness.(2)This, simply expressed, is the main point in the Kantian philosophy.
In the second place the philosophy of Kant is likewise called a critical philosophy because its aim, says Kant, is first of all to supply a criticism of our faculties of knowledge; for before obtaining knowledge we must inquire into the faculties of knowledge. To the healthy human understanding that is plausible, and to it this has been a great discovery. Knowledge is thereby represented as an instrument, as a method and means whereby we endeavour to possess ourselves of the truth. Thus before men can make their way to the truth itself they must know the nature and function of their instrument. They must see whether it is capable of supplying what is demanded of it - of seizing upon the object; they must know what the alterations it makes in the object are, in order that these alterations may not be mixed up with the determinations of the object itself.(3) This would appear as though men could set forth upon the search for truth with spears and staves. And a further claim is made when it is said that we must know the faculty of knowledge before we can know. For to investigate the faculties of knowledge means to know them; but how we are to know without knowing, how we are to apprehend the truth before the truth, it is impossible to say. It is the old story of the who would not go into the water till he could swim. Thus since the investigation of the faculties of knowledge is itself knowing, it cannot in Kant attain to what it aims at because it is that already - it cannot come to itself because it is already with itself; the same thing happens as happened with the Jews, the Spirit passes through the midst of them and they know it not. At the same time the step taken by Kant is a great and important one - that is, the fact that he has made knowledge the subject of his consideration.
