20 And again, The Lord knows the thoughts of the wise, that they are vain.
1 Corinthians 3:20 Cross References - EJ2000
Job 11:11-12
Psalms 2:1
1 ¶ Why do the Gentiles rage, and the peoples imagine a vain thing?
Psalms 94:11
11 The LORD knows the thoughts of man, that they are vanity.
Romans 1:21
21 because having known God, they did not glorify him as God, neither were thankful, but became vain in their imaginations, and their foolish heart was darkened.
Colossians 2:8
8 Beware lest any man spoil you through philosophy and vain deceit, after the traditions of men, according to the elements of the world, and not after Christ.