Aristotle (c. 384-322 BCE)
“Most people seem to owe their deception to pleasure, which appears to them to be a good although it is not; consequently they choose what is pleasant as a good, and avoid pain as an evil.”
- From The Nicomachean Ethics (Bekker number 1113b) by Aristotle, translated by J. A. K. Thomson (Penguin Classics, 2004).