SUPPOSE I should prove to you that you are deficient in what is most necessary and important to happiness, and that hitherto you have taken care of everything, rather than your duty ; and, to complete all, that you understand neither what God or man or good or evil means? That you are ignorant of all the rest, perhaps, you may bear to be told; but if I prove to you that you are ignorant even of yourself, how will you bear with me, and how will you have patience to stay and be convinced? Not at all. You will immediately be offended and go away. And yet what injury have I done you? unless a looking-glass injures a person not handsome, when it shows him to himself such as he is. Or unless a physician can be thought to affront his patient when he says to him, "Do you think, sir, that you ail nothing? You have a fever. Eat no meat to-day, and drink water." Nobody cries out here, "What an intolerable affront!" But if you say to anyone, Your desires are in a fermentation; your aversions are low; your intentions contradictory; your pursuits not conformable to nature; your opinions rash and mistaken; he presently goes away, and complains he is affronted.
EPICTETUS. DISCOURSES. Book ii. §14. ¶3.