Sec. II. Menedemus of Eretria took away the number and differences of virtues, on the ground that virtue was one though it had many names; for that just as mortal is synonymous with man, so temperance and bravery and justice were the same thing. And Aristo of Chios also made virtue one in substance, and called it soundness of mind: its diversities and varieties only existing in certain relations, as if one called our sight when it took in white objects white-sight, and when it took in black objects black-sight, and so on. For virtue, when it considers what it ought to do and what it ought not to do, is called prudence; and when it curbs passion, and sets a fit and proper limit to pleasure, it is called self-control; and when it is associated with our dealings and covenants with one another, it is called justice; just as a knife is one article, though at different times it cuts different things in half: and so, too, fire acts on different matter though it has but one property. And Zeno of Cittium seems to incline somewhat to the same view, as he defines prudence in distribution as justice, in choice as self-control, in endurance as fortitude: and those who defend these views maintain that by the term prudence Zeno means knowledge. But Chrysippus, thinking each particular virtue should be arranged under its particular quality, unwittingly stirred up, to use Plato's language, "a whole swarm of virtues,"[219] unusual and unknown. For as from brave we get bravery, and from mild mildness, and from just justice, so from acceptable he got acceptableness, and from good goodness, and from great greatness, and from the honourable honourableness, and he made virtues of many other such clevernesses, affabilities, and versatilities, and filled philosophy, which did not at all require it, with many strange names.