Letters 119.14

Hunger is not ambitious; it is quite satisfied to come to an end; nor does it care very much what food brings it to an end. Those things are but the instruments of a luxury which is not “happiness”; a luxury which seeks how it may prolong hunger even after repletion, how to stuff the stomach, not to fill it, and how to rouse a thirst that has been satisfied with the first drink. Horace’s words are therefore most excellent when he says that it makes no difference to one’s thirst in what costly goblet, or with what elaborate state, the water is served. For if you believe it to be of importance how curly-haired your slave is, or how transparent is the cup which he offers you, you are not thirsty.

Seneca, Letters to Lucilius 119.14, translated by Richard Mott Gummere