Not a Hint in the Word...

"Psalm 14, for example, is not saying that disbelief in God is folly; it is saying that 'fools' (those who do not live their lives according to the precepts of biblical wisdom literature) are acting as though they don't believe in God, even though all of those in the author's experience would say they did." Steven J.

The Amplified Bible goes back to the original Hebrew and amplifies each word so that we can see its depth of meaning. It translates Psalm 14:1 as "The [empty-headed:] fool has said...