Letters 121.2

Man needs one thing for his food, another for his exercise, another for his clothing, another for his instruction, and another for his pleasure. Everything, however, has reference to man’s needs, although everything does not make him better. Character is affected by different things in different ways: some things serve to correct and regulate character, and others investigate its nature and origin.

Seneca, Letters to Lucilius 121.2, translated by Richard Mott Gummere