And when the young man asked Epictetus, whether, if he fell sick and a friend asked him to come to his house to be tended in his sickness, he was to consent, he said, Where will you find me a Cynic's friend? For he must be another like himself, that he may be worthy to be counted as his friend; he must share with him the sceptre and the kingdom and be a worthy minister, if he is to be deemed worthy of his friendship, as Diogenes was worthy of Antisthenes, and Crates of Diogenes. Or do you think that if he salutes him as he comes near that makes him his friend, and the Cynic will count him worthy to receive him in his house? Wherefore, if this is your opinion and such your thoughts, look round rather for a fine dunghill to have your fever on, one that shelters you from the north wind, to save you from a chill. But you seem to me to want to get away into some one's house for a time and eat your fill. How comes it then that you should take in hand so great a matter?
Source: The Discourses of Epictetus, tr. by P.E Matheson,