Discourses: Book 3 22 : 19
But above all, the Cynic's governing principle should be purer than the sun; if not, he must needs be a gambler and a man of no principle, because he will be censuring the rest of mankind, while he himself is involved in some vice. For see what this means. To the kings and tyrants of this world their bodyguards and their arms used to afford the privilege of censuring certain persons, and the power also to punish those who do wrong, no matter how guilty they themselves were; whereas to the Cynic it is his conscience which affords him this power, and not his arms and his bodyguards. When he sees that he has watched over men, and toiled in their behalf; and that he has slept in purity, while his sleep leaves him even purer than he was before; and that every thought which he thinks is that of a friend and servant to the gods, of one who shares in the government of Zeus; and has always ready at hand the verse Lead thou me on, O Zeus, and Destiny,