Book 7.32

Suppose a man is ungrateful, he does not injure me, but himself; I had the enjoyment of my benefit when I bestowed it upon him. Because he is ungrateful, I shall not be slower to give but more careful; what I have lost with him, I shall receive back from others. But I will bestow a second benefit upon this man himself, and will overcome him even as a good husbandman overcomes the sterility of the soil by care and culture; if I do not do so my benefit is lost to me, and he is lost to mankind. It is no proof of a great mind to give and to throw away one's bounty; the true test of a great mind is to throw away one's bounty and still to give."