Letters 51.5

We ought to see to it that we flee to the greatest possible distance from provocations to vice. We should toughen our minds, and remove them far from the allurements of pleasure. A single winter relaxed Hannibal’s fibre; his pampering in Campania took the vigour out of that hero who had triumphed over Alpine snows. He conquered with his weapons, but was conquered by his vices.

Seneca, Letters to Lucilius 51.5, translated by Richard Mott Gummere