'Hellanicus says so in his history of Egypt.' For you might just as well say that as say 'Diogenes or Chrysippus or Cleanthes said so in his Ethics'. I ask, have you put any of these doctrines to the test, and formed a judgement of your own? Show us how you are wont to bear yourself in a storm on shipboard. Do you remember this distinction of good and bad when the sail cracks and you cry aloud to heaven, and some bystander, untimely merry, says 'Tell me, by the gods, what have you been telling us lately? Is it a vice to suffer shipwreck? Does it partake of vice?' Will you not take up a belaying pin and give him a drubbing? 'What have we to do with you, fellow? We are perishing, and you come and mock us.'
Source: The Discourses of Epictetus, tr. by P.E Matheson,