Letter 76 — On Learning Wisdom in Old Age (§3)

“You should keep learning as long as you are ignorant,—even to the end of your life, if there is anything in the proverb. And the proverb suits the present case as well as any: “As long as you live, keep learning how to live.” For all that, there is also something which I can teach in that school. You ask, do you, what I can teach? That even an old man should keep learning.”