Aristotle (c. 384-322 BCE)
“The man who shuns and fears everything and stands up to nothing becomes a coward; the man who is afraid of nothing at all, but marches up to every danger, becomes foolhardy. Similarly the man who indulges in every pleasure and refrains from none becomes licentious; but if a man behaves like a boor and turns his back on every pleasure, he is a case of insensibility.”
- From The Nicomachean Ethics (Book II, ii) by Aristotle, translated by J. A. K. Thomson (Penguin Classics, 2004).