1 Corinthians 3:18-20 NIV

18 Do not deceive yourselves. If any one of you thinks he is wise1 by the standards of this age,2 he should become a "fool" so that he may become wise.

References for 1 Corinthians 3:18

19 For the wisdom of this world is foolishness3 in God's sight. As it is written: "He catches the wise in their craftiness"a;4

References for 1 Corinthians 3:19

      20 and again, "The Lord knows that the thoughts of the wise are futile."b5

      References for 1 Corinthians 3:20