The theological theory contains a part. If for the divine will, supposed to be supernaturally revealed, we substitute the naturally revealed end toward which the Power manifested throughout Evolution works; then, since Evolution has been, and is still, working toward the highest life, it follows that conforming to those principles by which the highest life is achieved, is furthering that end. The doctrine that perfection or excellence of nature should be the object of pursuit, is in one sense true; for it tacitly recognizes that ideal form of being which the highest life implies, and to which Evolution tends. There is a truth, also, in the doctrine that virtue mast be the aim; for this is another form of the doctrine that the aim must be to fulfill the conditions to achievement of the highest life. That the intuitions of a moral faculty should guide or conduct, is a proposition in which a truth is contained; for these intuitions are the slowly organized results of experiences received by the race while living in presence of these conditions. And that happiness is the supreme end is beyond question true; for this is the concomitant of that highest life which every theory of moral guidance has distinctly or vaguely in view. So understanding their relative positions, those ethical systems which make virtue, right, obligation, the cardinal aims, are seen to be complementary to those ethical systems which make welfare, pleasure, happiness, the cardinal aims. Though the moral sentiments generated in civilized men by daily contact with social conditions and gradual adaptation to them, are indispensable as incentives and deterrents; and though the intuitions corresponding to these sentiments have, in virtue of their origin, a general authority to be reverently recognized; yet the sympathies and antipathies hence originating, together with the intellectual expressions of them, are, in their primitive forms, necessarily vague. To make guidance by them adequate to all requirements, their dictates have to be interpreted and made definite by science; to which end there must be analysis of those conditions to complete living which they respond to, and from converse with which they have arisen. And such analysis necessitates the recognition of happiness for each and all, as the end to be achieved by fulfillment of these conditions. Hence, recognizing in due degrees all the various ethical theories, conduct in its highest form will take as guides innate perceptions of right duly enlightened and made precise by an analytic intelligence, while conscious that these guides are proximately supreme solely because they lead to the ultimate supreme end, happiness special and general. CHAPTER X. THE RELATIVITY OF PAINS AND PLEASURES.