Of course this "deduction" is not history: it is logic. It says, if you posit sensation, then in doing so, you posit a good deal more. You have imagination, reason, and many more, all involved in your original assumption. And there is a further point to be noted. You cannot really stop even at reason, at intelligence and will, if you take these in the full sense. You must realise that these only exist as part and parcel of a reasonable world. An individual intelligence presupposes a society of intelligences. The successive steps in this argument are presented by Fichte in the chief works of his earlier period (1794-98). The works of that period form a kind of trilogy of philosophy, by which the faint outlines of the absolute selfhood is shown acquiring definite consistency in the moral organisation of society. First comes the "Foundation for the collective philosophy." It shows how our conception of reality and our psychical organisation are inevitably presupposed in the barest function of intelligence, in the abstractest forms of logical law. Begin where you like, with the most abstract and formal point of consciousness, you are forced, as you dwell upon it (you identifying yourself with the thought you realise), to go step by step on till you accept as a self-consistent and self-explanatory unity all that your cognitive and volitional nature claims to own as its birthright. Only in such an intelligent will is perception and sensation possible. Next came the "Foundation of Natural Law, on the principles of the general theory." Here the process of deduction is carried a step further. If man is to realise himself as an intelligence with an inherent bent to action, then he must be conceived as a person among persons, as possessed of rights, as incapable of acting without at the same moment claiming for his acts recognition, generality, and logical consecution. The reference, which in the conception of a practical intelligence was implicit,--the reference to fellow-agents, to a world in which law rules--is thus, by the explicit recognition of these references, made a fact patent and positive--_gesetzt_,--expressly instituted in the way that the nature and condition of things postulates. But this is not all: we step from the formal and absolute into the material and relative. If man is to be a real intelligence, he must be an intelligence served by organs. "The rational being cannot realise its efficient individuality, unless it ascribes to itself a material body": a body, moreover, in which Fichte believes he can show that the details of structure and organs are equally with the general corporeity predetermined by reason(51). In the same way it is shown that the social and political organisation is required for the realisation--the making positive and yet coherent--of the rights of all individuals. You deduce society by showing it is required to make a genuine individual man. Thirdly came the "System of Ethics." Here it is further argued that, at least in a certain respect(52), in spite of my absolute reason and my absolute freedom, I can only be fully real as a part of Nature: that my reason is realised in a creature of appetite and impulse. From first to last this deduction is one process which may be said to have for its object to determine "the conditions of self-hood or egoity." It is the deduction of the concrete and empirical moral agent--the actual ego of actual life--from the abstract, unconditioned ego, which in order to be actual must condescend to be at once determining and determined.