'Folly' in the Bible

covetousness, wickedness, deceit, licentiousness, envy, reviling, pride, reckless folly:

What I am now saying, I do not say by the Lord's command, but as a fool in his folly might, in this reckless boasting.

I use the language of self-disparagement, as though I were admitting our own feebleness. Yet for whatever reason any one is 'courageous' --I speak in mere folly--I also am courageous.

But they will have no further success; for their folly will be as clearly manifest to all men, as that of the opponents of Moses came to be.