A quote
But you must not think that our school alone can utter noble words; Epicurus himself, the reviler of Stilbo, spoke similar language; put it down to my credit, though I have already wiped out my debt for the present day. He says: “Whoever does not regard what he has as most ample wealth, is unhappy, though he be master of the whole world.” Or, if the following seems to you a more suitable phrase,—for we must try to render the meaning and not the mere words: “A man may rule the world and still be unhappy, if he does not feel that he is supremely happy.”
Seneca·Letter 9 — On Philosophy and Friendship (§20)·trans. Gummere