He was one of the most celebrated disciples of Aristâtalis, after whose decease he occupied his chair, and engaged in teaching. He composed trustworthy books, and the following are some of his sayings: ‘Things not connected with the mind concur sometimes in distracting it from its proper functions; such, for instance, are the physical pleasures of eating and drinking.—An unrighteous king, a rich man of unsettled habits, a grandee whose words cannot be trusted, a donor who indiscriminately scatters his wealth, and a virtuous man without firmness of purpose, must not be accounted rich, but needy.’