Ad Graecas literas totum animum applicui; statimque ut pecuniam accepero, Graecos primum autores, deinde vestes emam. - Erasmus

Animals only follow their natural instincts; but man, unless he has experienced the influence of learning and philosophy, is at the mercy of impulses that are worse than those of a wild beast. There is no beast more savage and dangerous than a human being who is swept along by the passions of ambition, greed, anger, envy, extravagance, and sensuality.

The very elements themselves, though repugnant in their nature, yet, by a happy equilibrium, preserve eternal peace; and amid the discordancy of their constituent principles, cherish, by a friendly intercourse and coalition, an uninterrupted concord.

Whatever you see in the more material part of yourself, learn to refer to God and to the invisible part of yourself. In that way, whatever offers itself to the senses will become for you an occasion for the practice of piety.