Reading in Proverbs, a collection of common sense wisdom, and was caught by a couple descriptions of "fools". Far too easy, and comfortable, to point the finger at others for their foolishness. So, I'll grudgingly admit that these phrases have described me from time to time. Try them on for size:
"Fools die for lack of sense" (Proverbs 10:21).
"Doing wrong is like sport to a fool" (Proverbs 10:23).