Robinson Crusoe

I read to my son frequently, and gave Robinson Crusoe a try. (Great book, but the old language was too hard for him.) But, anyway, it had a neat quote - though in rather archaic language - about the perversity of human nature:

"They are not ashamed to sin, and yet are ashamed to repent; not ashamed of the action, for which they ought justly to be esteemed fools; but are ashamed of the returning, which only can make them be esteemed wise men."