The two antagonist theories of morals, like many other antagonist theories, are both right and both wrong. The _a priori_ school has its truth; the _a posteriori_ school has its truth; and for the proper guidance of conduct, there must be due recognition of both. On the one hand, it is asserted that there is an absolute standard of rectitude; and, respecting certain classes of actions, it is rightly so asserted. From the fundamental laws of life and the conditions of social existence, are deducible certain imperative limitations to individual action—limitations which are essential to a perfect life, individual and social; or, in other words, essential to the greatest happiness. And these limitations, following inevitably as they do from undeniable first principles, deep as the nature of life itself, constitute what we may distinguish as absolute morality. On the other hand it is contended, and in a sense rightly contended, that with men as they are and society as it is, the dictates of absolute morality are impracticable. Legal control, which involves infliction of pain, alike on those who are restrained and on those who pay the cost of restraining them, is proved by this fact to be not absolutely moral; seeing that absolute morality is the regulation of conduct in such way that pain shall not be inflicted. {153} Wherefore, if it be admitted that legal control is at present indispensable, it must be admitted that these _a priori_ rules cannot be immediately carried out. And hence it follows that we must adapt our laws and actions to the existing character of mankind—that we must estimate the good or evil resulting from this or that arrangement, and so reach, _a posteriori_, a code fitted for the time being. In short, we must fall back on expediency. Now, each of these positions being valid, it is a grave mistake to adopt either to the exclusion of the other. They should be respectively appealed to for mutual qualification. Progressing civilization, which is of necessity a succession of compromises between old and new, requires a perpetual readjustment of the compromise between the ideal and the practicable in social arrangements: to which end both elements of the compromise must be kept in view. If it is true that pure rectitude prescribes a system of things too good for men as they are; it is not less true that mere expediency does not of itself tend to establish a system of things any better than that which exists. While absolute morality owes to expediency the checks which prevent it from rushing into utopian absurdities; expediency is indebted to absolute morality for all stimulus to improvement. Granted that we are chiefly interested in ascertaining what is _relatively right_; it still follows that we must first consider what is _absolutely right_; since the one conception presupposes the other. That is to say, though we must ever aim to do what is best for the present times, yet we must ever bear in mind what