Letter 90 — On the Part Played by Philosophy in the Progress of Man (§30)

“It is my opinion that the wise man has not withdrawn himself, as Posidonius thinks, from those arts which we were discussing, but that he never took them up at all. For he would have judged that nothing was worth discovering that he would not afterwards judge to be worth using always. He would not take up things which would have to be laid aside.”