Aristotle (c. 384-322 BCE)
“It is easy to get angry – anyone can do that – or to give and spend money; but to feel or act towards the right person to the right extent at the right time for the right reason in the right way – that is not easy, and it is not everyone that can do it.”
- From The Nicomachean Ethics (Bekker number 1109a) by Aristotle, translated by J. A. K. Thomson (Penguin Classics, 2004).