By running up all the different virtues too to this one species of propriety, Epicurus indulged a propensity, which is natural to all men, but which philosophers in particular are apt to cultivate with a peculiar fondness, as the great means of displaying their ingenuity, the propensity to account for all appearances from as few principles as possible. And he, no doubt, indulged this propensity still further, when he referred all the primary objects of natural desire and aversion to the pleasures and pains of the body. The great patron of the atomical philosophy, who took so much pleasure in deducing all the powers and qualities of bodies from the most obvious and familiar, the figure, motion, and arrangement of the small parts of matter, felt no doubt a similar satisfaction, when he accounted, in the same manner, for all the sentiments and passions of the mind from those which are most obvious and familiar. The system of Epicurus agreed with those of Plato, Aristotle, and Zeno, in making virtue consist in acting in the most suitable manner to obtain the [17]primary objects of natural desire. It differed from all of them in two other respects; first, in the account which it gave of those primary objects of natural desire; and secondly, in the account which it gave of the excellence of virtue, or of the reason why that quality ought to be esteemed. Footnote 17: Prima naturæ. The primary objects of natural desire consisted, according to Epicurus, in bodily pleasure and pain, and in nothing else whereas, according to the other three philosophers, there were many other objects, such as knowledge, such as the happiness of our relations, of our friends, of our country, which were ultimately desirable for their own sakes. Virtue too, according to Epicurus, did not deserve to be pursued for its own sake, nor was itself one of the ultimate objects of natural appetite, but was eligible only upon account of its tendency to prevent pain and to procure ease and pleasure. In the opinion of the other three, on the contrary, it was desirable, not merely as the means of procuring the other primary objects of natural desire, but as something which was in itself more valuable than them all. Man, they thought, being born for action, his happiness must consist, not merely in the agreeableness of his passive sensations, but also in the propriety of his active exertions. CHAP. III. _Of those systems which make virtue consist in benevolence._ The system which makes virtue consist in benevolence, though I think not so ancient as all of those which I have already given an account of, is, however, of very great antiquity. It seems to have been the doctrine of the greater part of those philosophers who, about and after the age of Augustus, called themselves Eclectics, who pretended to follow chiefly the opinions of Plato and Pythagoras, and who upon that account are commonly known by the name of the later Platonists.