Epictetus 3.22.15-19
But the Cynic, instead of all these defences, has to make his self-respect his protection; if he does not, he will be disgracing himself naked and out of doors. His self-respect is his house, his door, his guards at the entrance to his bedroom, his darkness. For neither ought he to wish to keep concealed anything that is his (otherwise he is lost, he has destroyed the Cynic within him, the man of outdoor life, the free man; he has begun to fear something external, he has begun to need something to conceal him), nor can he keep it concealed when he wishes to do so. For where will he conceal himself, or how? And if this instructor of us all, this "pedagogue," chance to get caught, what must he suffer! Can, then, a man who is afraid of all this continue with all his heart to supervise the conduct of other men? It cannot be done, it is impossible. In the first place, then, you must make your governing principle pure, and you must make the following your plan of life: