The agent must, of course, in an economic judgment-process, recognize and take account of such facts as the technical adaptability of the means he is proposing to use to the new purpose that is forming, as also of environing conditions which may affect the success which he may meet with in applying them. He must consider also his own physical strength and qualities of mind with a view to this same technical problem. And similarly in ethical valuation, as we have seen, the psychology of the "empirical ego" must play its part. But the conditions thus recognized are, as we might seek to show more in detail, explainable as the outcome of past factual judgment-processes, and on the occasion of their original definition in the form in which they now are known played the sanctioning part of which we have so often spoken. They therefore correspond to the agent's accepted practical ideals, so that the control which his past experience exercises over his present conduct may be stated equally well in either sort of terms--in terms of his prevailing recognized standards, or in terms of his present knowledge of the conditions which his new purpose must respect. Thus, in general, the concept of a physical order conditioning the conduct of all men and presented in a definite body of socially current knowledge is the logical correlate of the moral law conceived as a categorical imperative prescribing certain types of conduct. Thus the error of regarding the agent's conduct in a present emergency as an outcome of existing determining conditions is logically identical with the corresponding error of the ethical theory of self-realization. The latter holds the logical possibility of a determinate descriptive ideal (already realized in the unchanging Absolute Self) which is adequate to the solution of all possible ethical problems. The former holds that all conduct must be subject to the determining force of external conditions which, if not at present completely known, are at least in theory knowable. The physical universe in its original nebulous state contained the "promise and potency" of all that has been in the way of human conduct and of all that is to be. Into the fixed mechanical system no new energy can enter and from it none of the original fund of energy can be lost. This mechanical theory of conduct is the essential basis of the hedonistic theory of ethics; and it would not be difficult to show that Green's criticism of this latter and his own affirmative theory of the moral ideal (as also the current conventional criticism of hedonism in the same tenor by the school of Green) are in a logical sense identical with it. For the assumption that conduct is determined by existing objective conditions is precisely the logical correlate of the concept of a contentual and "realizable" ideal moral self.[156]