The reader will now be in a position to perceive the utter futility of the objections which from the time of Locke have been continually brought against the theory of natural moral perceptions, upon the ground that some actions which were admitted as lawful in one age, have been regarded as immoral in another. All these become absolutely worthless when it is perceived that in every age virtue has consisted in the cultivation of the same feelings, though the standards of excellence attained have been different. The terms higher and lower, nobler or less noble, purer or less pure, represent moral facts with much greater fidelity than the terms right or wrong, or virtue or vice. There is a certain sense in which moral distinctions are absolute and immutable. There is another sense in which they are altogether relative and transient. There are some acts which are so manifestly and grossly opposed to our moral feelings, that they are regarded as wrong in the very earliest stages of the cultivation of these feelings. There are distinctions, such as that between truth and falsehood, which from their nature assume at once a sharpness of definition that separates them from mere virtues of degree, though even in these cases there are wide variations in the amount of scrupulosity that is in different periods required. But apart from positive commands, the sole external rule enabling men to designate acts, not simply as better or worse, but as positively right or wrong, is, I conceive, the standard of society; not an arbitrary standard like that which Mandeville imagined, but the level which society has attained in the cultivation of what our moral faculty tells us is the higher or virtuous part of our nature. He who falls below this is obstructing the tendency which is the essence of virtue. He who merely attains this, may not be justified in his own conscience, or in other words, by the standard of his own moral development, but as far as any external rule is concerned, he has done his duty. He who rises above this has entered into the region of things which it is virtuous to do, but not vicious to neglect—a region known among Catholic theologians by the name of “counsels of perfection.” No discussions, I conceive, can be more idle than whether slavery, or the slaughter of prisoners in war, or gladiatorial shows, or polygamy, are essentially wrong. They may be wrong now—they were not so once—and when an ancient countenanced by his example one or other of these, he was not committing a crime. The unchangeable proposition for which we contend is this—that benevolence is always a virtuous disposition—that the sensual part of our nature is always the lower part.