Epictetus 3.22.20-24
"From now on my mind is the material with which I have to work, as the carpenter has his timbers, the shoemaker his hides; my business is to make the right use of my impressions. My paltry body is nothing to me; the parts of it are nothing to me. Death? Let it come when it will, whether it be the death of the whole or some part. Exile? And to what place can anyone thrust me out? Outside the universe he cannot. But wherever I go, there are sun, moon, stars, dreams, omens, my converse with gods." In the next place, the true Cynic, when he is thus prepared, cannot rest contented with this, but he must know that he has been sent by Zeus to men, partly as a messenger, in order to show them that in questions of good and evil they have gone astray, and are seeking the true nature of the good and the evil where it is not, but where it is they never think; and partly, in the words of Diogenes, when he was taken off to Philip, after the battle of Chaeroneia, as a scout. For the Cynic is truly a scout, to find out what things are friendly to men and what hostile;