Epicurus, in placing happiness in not being hungry, or thirsty, or cold, uttered that godlike word, saying impiously that he would fight in these points even with Father Jove; teaching, as if it were the case of pigs that live in filth and not that of rational philosophers, that happiness was victory. For of those that are ruled by pleasure are the Cyrenaics and Epicurus; for these expressly said that to live pleasantly was the chief end, and that pleasure was the only perfect good. Epicurus also says that the removal of pain is pleasure; and says that that is to be preferred, which first attracts from itself to itself, being, that is, wholly in motion. Dinomachus and Callipho said that the chief end was for one to do what he could for the attainment and enjoyment of pleasure; and Hieronymus the Peripatetic said the great end was to live unmolested, and that the only final good was happiness; and Diodorus likewise, who belonged to the same sect, pronounces the end to be to live undisturbed and well. Epicurus indeed, and the Cyrenaics, say that pleasure is the first duty; for it is for the sake of pleasure, they say, that virtue was introduced, and produced pleasure. According to the followers of Calliphon, virtue was introduced for the sake of pleasure, but that subsequently, on seeing its own beauty, it made itself equally prized with the first principle, that is, pleasure. But the Aristotelians lay it down, that to live in accordance with virtue is the end, but that neither happiness nor the end is reached by every one who has virtue. For the wise man, vexed and involved in involuntary mischances, and wishing gladly on these accounts to flee from life, is neither fortunate nor happy. For virtue needs time; for that is not acquired in one day which exists [only] in the perfect man; since, as they say, a child is never happy. But human life is a perfect time, and therefore happiness is completed by the three kinds of good things. Neither, then, the poor, nor the mean, nor even the diseased, nor the slave, can be one of them.