Letter 58 — On Being (§25)

““Very well,” say you, “what good shall I get from all this fine reasoning?” None, if you wish me to answer your question. Nevertheless, just as an engraver rests his eyes when they have long been under a strain and are weary, and calls them from their work, and “feasts” them, as the saying is; so we at times should slacken our minds and refresh them with some sort of entertainment. But let even your entertainment be work; and even from these various forms of entertainment you will select, if you have been watchful, something that may prove wholesome.”