"Luck is what happens when preparation meets opportunity."
— Seneca
Luck Is What Happens When Preparation
Luck is what happens when preparation meets opportunity.
From Letters from a Stoic
About this quote
This exact wording does not appear in Seneca's surviving works, though the idea is consistent with his philosophy. It likely condenses a passage from De Beneficiis (On Benefits) and themes scattered through the Letters to Lucilius, where Seneca repeatedly argues that fortune favors the prepared mind. The phrasing gained wide currency as a motivational aphorism in the 20th century.
Source
Attributed, paraphrased from Letters to Lucilius