Lucian of Samosata Vitarum auctio 10

The traits that you should possess in particular are these: you should be impudent and bold, and should abuse all and each, both kings and commoners, for thus they will admire you and think you manly. Let your language be barbarous, your voice discordant and just like the barking of a dog: let your expression be set, and your gait consistent with your expression. In a word, let everything about you be bestial and savage. Put off modesty, decency and moderation, and wipe away blushes from your face completely. Frequent the most crowded place, and in those very places desire to be solitary and uncommunicative, greeting nor friend nor stranger; for to do so is abdication of the empire. ¹ Do boldly in full view of all what another would not do in secret; choose the most ridiculous ways of satisfying your lust; and at the last, if you like, eat a raw devilfish or squid, and die. ² That is the bliss we vouchsafe you.

‘The heart may burn, the tongue knows nought thereof’ ¹ Above all, be bold, be impudent; distribute your abuse impartially to king and commoner. They will admire your spirit. You will talk the Cynic jargon with the true Cynic snarl, scowling as you walk, and walking as one should who scowls; an epitome of brutality. Away with modesty, good-nature, and forbearance. Wipe the blush from your cheek for ever. Your hunting-ground will be the crowded city. You will live alone in its midst, holding communion with none, admitting neither friend nor guest; for such would undermine your power. Scruple not to perform the deeds of darkness in broad daylight: select your love-adventures with a view to the public entertainment: and finally, when the fancy takes you, swallow a raw cuttle-fish, and die. Such are the delights of Cynicism.