It would seem, then, that the facts of experience are sufficient to show that a man's conduct does not always follow the course which he thinks likely to bring him the greatest pleasure on the whole. But the view that a man always acts for what is most pleasant--or least painful--at the time cannot be dismissed so easily. It is not enough simply to point to the facts of human action in order to show that this hypothesis is inconsistent with them. If we instanced the self-restraint in which so many pass their lives from day to day, it might perhaps be answered that there is a persistent idea of duty, or love of reputation, or fear of social stigma, the repression of which would be more painful than the restraint it puts upon other impulses. Even the martyr who deliberately parts with life itself for the sake of an ideal, may be said to choose death as the least painful course open to him at the time. It should be borne in mind, however, that Professor Bain, the most thorough psychologist of Bentham's school, refuses to admit this line of defence for psychological hedonism, and holds that, in actions such as those referred to, men are really carried out of the circle of their self-regarding desires.[28] But my present purpose is not to discuss the merits of any such psychological theory, but rather to investigate its ethical consequences. And for this purpose the question requires to be put, how a passage is effected from psychological hedonism to an egoistic--and even to a utilitarian--theory of ethics. [Sidenote: The postulate that action can be rationalised] [Sidenote: involves these conditions,]