Arrian (c. 90-173+)
“Luck, remember, is an unpredictable thing, and against what it may bring no man has any defence.”
- From Arrian’s The Campaigns of Alexander (Book 5), translated by Aubrey de Sélincourt and revised by J. Hamilton. New York; Penguin Classics, 1971. Specifically, it comes out of a speech that Arrian wrote from the point of view of Alexander’s advisor, Coenus.