Arrian (c. 90-173+)
“Sir, if there is one thing above all others a successful man should know, it is when to stop.”
- A speech by Coenus to Alexander the Great written by Arrian in The Campaigns of Alexander (Book 5, approximately chapter 28), translated by Aubrey de Sélincourt and revised by J. Hamilton. New York; Penguin Classics, 1971.