You should keep on learning as long as there is something you do not know.

While you teach, you learn.

There is as much greatness of mind in the owning of a good turn as in the doing of it; and we must no more force a requital out of season than be wanting in it.

One must take all one's life to learn how to leave, and what will perhaps make you wonder more, one must take all one's life to learn how to die.

Difficulties strengthen the mind, as labor does the body.

It is a tedious thing to be always beginning life; they live badly who always begin to live.

Whatever we owe, it is our part to find where to pay it, and to do it without asking, too; for whether the creditor be good or bad, the debt is still the same.