1 Corinthians 3:20
And again: Jehovah knows the thoughts of the wise, that they are vain (useless) (empty). (Psalm 94:11)
Psalm 94:11
Jehovah knows the thoughts of man. He knows that they a mere vanity.
Job 11:11-12
He recognizes deceitful men. When he sees evil, does he not take note?
Psalm 2:1
Why do the nations conspire together and rage? Why do the peoples plot in vain?
Romans 1:21
for when they knew God, they did not glorify him as God. They did not thank him and were vain in their reasoning, for their foolish hearts were darkened.
Colossians 2:8
See to it that no one enslaves you by means of philosophy and worthless deceit of human wisdom according to tradition of men. It is according to the elementary principles of the world, and not from Christ.