"But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, idiot, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire." (Matt. 5.22)
"A fool hath no delight in understanding, but that his heart may discover itself." (Prov. 18.2)
"Only a fool says in his heart there is no God" (Psalm 14:1).
