Psalms 94:11The LORD knoweth the thoughts of man, that they are vanity.
Job 11:11-12For he knoweth vain men: he seeth wickedness also; will he not then consider it? For vain man would be wise, though man be born like a wild ass's colt.
Psalms 2:1Why do the heathen rage, and the people imagine a vain thing?
Romans 1:21Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.
Colossians 2:8Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ.