XVII. I think here we ought to make a distinction, in order to render this point more intelligible. Benefits are of two kinds: one, the perfect and true benefit, which can only be bestowed by one wise man upon another; the other, the common vulgar form which ignorant men like ourselves interchange. With regard to the latter, there is no doubt that it is my duty to repay it whether my friend turns out to be a murderer, a thief, or an adulterer. Crimes have laws to punish them; criminals are better reformed by judges than by ingratitude; a man ought not to make you bad by being so himself. I will fling a benefit back to a bad man, I will return it to a good man; I do so to the latter, because I owe it to him; to the former, that I may not be in his debt. XVIII. With regard to the other class of benefit, the question arises whether if I was not able to take it without being a wise man, I am able to return it, except to a wise man. For suppose I do return it to him, he cannot receive it, he is not any longer able to receive such a thing, he has lost the knowledge of how to use it. You would not bid me throw back [Footnote: i.e. in the game of ball.] a ball to a man who has lost his hand; it is folly to give any one what he cannot receive. If I am to begin to reply to the last argument, I say that I should not give him what he is unable to take; but I would return it, even though he is not able to receive it. I cannot lay him under an obligation unless he takes my bounty; but by returning it I can free myself from my obligations to him. You say, "he will not be able to use it." Let him see to that; the fault will lie with him, not with me.