De Stoicorum repugnantiis

I first lay this down for an axiom, that there ought to be seen in men’s lives an agreement with their doctrines. For it is not so necessary that the pleader (as Aeschines has it) and the law speak one and the same thing, as that the life of a philosopher be consonant to his speech. For the speech of a philosopher is a law of his own and voluntarily imposed on himself, unless they esteem philosophy to be a game, or an acuteness in disputing invented for the gaining of applause, and not—what it really is—a thing deserving our greatest study.

Since then there are in their discourses many things written by Zeno himself, many by Cleanthes, and most of all by Chrysippus, concerning policy, governing, and being governed, concerning judging and pleading, and yet there is not to be found in any of their lives either leading of armies, making of laws, going to parliament, pleading before the judges, fighting for their country, travelling on embassies, or bestowing of public gifts, but they have all, feeding (if I may so say) on rest as on the lotus, led their whole lives, and those not short but very long ones, in foreign countries, amongst disputations, books, and walkings; it is manifest that they have lived rather according to the writings and sayings of others than their own professions, having spent all their days in that repose which Epicurus and Hieronymus so much commend.