Seneca,
Moral letters to Lucilius — Letter 60…
“ How small is the amount which will satisfy nature? A very little will send her away contented. It is not the natural hunger of our bellies that costs us dear, but our solicitous cravings. 4. Therefore those who, as Sallust [1] puts it, "hearken to their bellies," should be numbered among the animals, and not among men; and certain men, indeed, should be numbered, not even among the animals, but among the dead. He really lives who is made use of by many; he really lives who makes use of himself. ”
