Fichte was constantly revising the presentation of his core Wissenschaftslehre or “teaching of science”. He was very dissatisfied with the rushed writing of the 1794-95 Foundations of the Entire Wissenschaftslehre, translated as The Science of Knowledge, which was the only one published during his lifetime. The 1796-99 Wissenschaftslehre nova methodo, now translated as Foundations of Transcendental Philosophy, does seem more accessible and has many points of interest, but in broad outline carries forward the main theses of his earlier work. His 1804 lectures on the other hand, now translated as The Science of Knowing, contain major innovations.
The goal of both of the earlier works seems to be to elaborate a consistent philosophy based on radical “subject-centeredness”. The second introduction to the 1796-99 work develops a vivid polar contrast between “idealism” (which he says grounds everything in the subject) and “dogmatism” (which he says unsuccessfully attempts to ground everything in being or reality). “Idealism begins with the representing subject; dogmatism begins with the thing” (p. 93).
Kant had famously criticized dogmatic versions of realism with rather broad strokes, but called himself both a transcendental idealist and an empirical realist. Whatever one’s opinion of the Kantian “thing in itself” that would exist in spite of our failure to grasp it, it was clearly part of his concern to retain a notion of objective reality while rejecting its dogmatic use. Normally we contrast idealism with realism, and a critical attitude with dogmatism. By the clever rhetorical device of mixing up these two polarities, Fichte implies that all philosophically “realist” concerns are dogmatic. At this point, Fichte was a radical subjectivist (even though he was never a vulgar subjectivist, since his “subject” was always a subject of reason). In the same work, he further confirms this by talking in an unqualified way about the subject’s “absolute freedom”. He rejects the modest assertion of an unknown thing-in-itself, but claims to have an infallible intellectual intuition of the “I”. “Self-reverting activity and the I are one and the same” (p. 112). “All consciousness is accompanied by an immediate self-consciousness, which is called ‘intellectual intuition’, and this immediate self-consciousness must be presupposed if one is to think at all” (pp. 119-120).
I’m now looking for the first time at his 1804 lectures. Here he significantly modifies aspects of his stance. There is much less emphasis on the I. Instead, “the essence of philosophy would consist in this: to trace all multiplicity (which presses upon us in the usual view of life) back to absolute oneness” (p. 23). “[A]bsolute oneness can no more reside in being than in its correlative consciousness; it can as little be posited in the thing as in the representation of the thing. Rather, it resides in the principle, which we have just discovered, of the absolute oneness and indivisibility of both, which is equally, as we have seen, the principle of their disjunction. We will name this principle pure knowing, knowing in itself, and, thus, completely objectless knowing…. It is distinct from consciousness, which posits a being and is therefore only a half. This is Kant’s discovery, and is what makes him the founder of Transcendental Philosophy. Like Kantian philosophy, the science of knowing… does not posit the absolute in the thing, as previously, or in subjective knowing — which is simply impossible, because whoever reflects on this second term already has the first — but in the oneness of both” (pp. 25-26). “[F]or this kind of philosophy the difference between being and thinking, as valid in itself, totally disappears” (p. 30).
So he seems to have moved from a highly asymmetric view of subject and object to a much more symmetrical one. Unfortunately, the idea of reducing the Many to the One, even if he handles it in less cavalier fashion than Schelling, still leads to what Hegel called the “night in which all cows are black”.