Aristotle (384-322 BCE)
“It is the mark of a courageous man to face things that are terrible to a human being, and that he can see are such, because it is a fine act to face then and a disgrace not to do so.”
- From The Nicomachean Ethics (Bekker number 1117a) by Aristotle, translated by J. A. K. Thomson (Penguin Classics, 2004).