EPICTETUS. DISCOURSES. Book ii. §1. ¶5.
SET death before me, set pain, set a prison, set ignomony, set condemnation before me, and you will know me. This is the proper ostentation of a young man come out from the schools. Leave the rest to others. Let no one ever hear you utter a word about them, nor suffer it, if anyone commends you for them: but think that you are nobody, and that you know nothing. Appear to know only this, how you may never be disappointed of your desire; never incur your aversion. Let others study causes, problems, and syllogisms. Do you study death, chains, torture, exile: and all these with courage, and reliance upon him who hath called you to them, and judged you worthy a post in which you may show what the rational governing faculty can do when set in array against powers independent on the choice. And thus, this paradox becomes neither impossible nor a paradox, that we must be at once cautious and courageous: courageous in what doth not depend upon choice, and cautious in what doth.