66. Fools of little understanding have themselves for their greatest enemies, for they do evil deeds which must bear bitter fruits.
67. That deed is not well done of which a man must repent, and the reward of which he receives crying and with a tearful face.
68. No, that deed is well done of which a man does not repent, and the reward of which he receives gladly and cheerfully.
DHAMMAPADA, Chapter 5. The Fool