'As a Fool' in the Bible

The person who gathers wealth by unjust means is like the partridge that broods over eggs but does not hatch them. Before his life is half over he will lose his ill-gotten gains. At the end of his life it will be clear he was a fool."

I say again, let no one think that I am a fool. But if you do, then at least accept me as a fool, so that I too may boast a little.