The happiness of your life depends upon the quality of your thoughts: therefore, guard accordingly, and take care that you entertain no notions unsuitable to virtue and reasonable nature.
Marcus Aurelius (Emperor of Rome), André Dacier, Thomas Gataker, Cebes (of Thebes.) (1726). “The Emperor Marcus Antoninus: His Conversation with Himself. Together with the Preliminary Discourse of the Learned Gataker”, p.155
