Cleanthes could not have been the express image of Zeno, if he had merely heard his lectures; he shared in his life, saw into his hidden purposes, and watched him to see whether he lived according to his own rules. Plato, Aristotle, and the whole throng of sages who were destined to go each his different way, derived more benefit from the character than from the words of Socrates. It was not the class-room of Epicurus, but living together under the same roof, that made great men of Metrodorus, Hermarchus, and Polyaenus.
