Letters 119.10

He, however, who has arranged his affairs according to nature’s demands, is free from the fear, as well as from the sensation, of poverty. And in order that you may know how hard it is to narrow one’s interests down to the limits of nature—even this very person of whom we speak, and whom you call poor, possesses something actually superfluous.

Seneca, Letters to Lucilius 119.10, translated by Richard Mott Gummere