Thus as Kant treats of cognition [Erkennen], so Fichte sets forth real knowledge [Wissen]. Fichte states that the task of Philosophy is to find a theory of knowledge; universal knowledge is both the object and the starting-point of Philosophy. Consciousness knows, that is its nature; the end of philosophic learning is the knowledge of this knowledge. Hence Fichte called his philosophy the Theory of Knowledge (Begriff der Wissenschaftslehre, p. 181), the science of knowledge. That is to say ordinary consciousness as the active ego finds this and that, occupies itself, not with itself, but with other objects and interests, but the necessity that I bring forth determinations, and which determinations - cause and effect, for example, - lies beyond my consciousness: I bring them forth instinctively and cannot get behind my consciousness. But when I philosophize, I make my ordinary consciousness itself my object, because I make a pure category my consciousness. Iknow what my ego is doing, and thus I got behind my ordinary consciousness. Fichte thus defines Philosophy as the artificial consciousness.(8)a. Where Fichte in his system has attained the highest degree of determinateness he begins, as we saw Kant did before (pp. 437, 438), from the transcendental unity of self-consciousness; in it I -as this - am one, this unity is to Fichte the same and the original. Ego is there a fact, says Fichte, but not yet a proposition. As proposition, as principle, the ego must not remain barren, nor be accepted as one, for to a proposition pertains a synthesis. Now Fichte proceeds in his system from the fact that Philosophy must begin with an absolutely unconditioned, certain principle, with something indubitably certain in ordinary knowledge. “It cannot be proved or defined, because it must, be absolutely the first principle.” (9) According to Wendt's account (Tennernann's Grundriss, § 393, pp. 494, 495) Fichte gives an exposition of the necessity of such a principle as follows: “Scientific knowledge is a system of cognition obtained through a supreme principle which expresses the content and form of knowledge. The theory of knowledge is the science of knowledge which sets forth the possibility and validity of all knowledge, and proves the possibility of principles in reference to form and content, the principles themselves, and thereby the connection existing in all human knowledge. It must have a principle which can neither be proved from it nor from another science; for it is supreme. If there is a theory of knowledge there also is a system; if there is a system there is also a theory of knowledge and an absolute first principle -and so on through an inevitable circle.” (10)The simple principle of this knowledge is certainty of myself, which is the relation of me to myself;what is in me, that I know. The supreme principle, as immediate and not derived, must be certain on its own account; that is, a determination of the ego only, for it is only from the ego that I cannot abstract.(11) Fichte thus begins, like Descartes, with 'I think, therefore I am,' and he expressly brings this proposition to mind. The Being of the ego is not a dead, but a concrete Being; but the highest Being is thought. Ego, as an explicitly self-existent activity of thought, is thus knowledge, even if it is only abstract knowledge, as in the beginning at least it cannot help being. At the same time Fichte begins from this absolute certainty with quite other necessities and demands; for from this ego not only Being but also the larger system of thought has to be derived (supra, p. 230).
According to Fichte, the ego is the source of the categories and ideas, but all conceptions and thoughts are a manifold reduced to a synthesis through Thought. Thus while with Descartes in connection with the ego other thoughts appear which we simply find already in us, such as God, nature, &c., Fichte sought for a philosophy entirely of a piece, in which nothing empiric was to be admitted from without. With this reflection a false point of view was at once introduced, namely that contained in the old conception of knowledge, of commencing with principles in this form and proceeding from them; so that the reality which is derived from such a principle is brought into opposition with it, and hence in truth is something different, i.e. it is not derived: or that principle for this same reason expresses only the absolute certainty of itself and not the truth. The ego is certain, it cannot be doubted; but Philosophy desires to reach the truth. The certainty is subjective, and because it is made to remain the basis, all else remains subjective also without there being any possibility of this form being removed. Fichte now analyzes the ego, reducing it to three principles from which the whole of knowledge has to be evolved.
