1 Corinthians 3:18

3:18 Guard against self-deception, each of you. ¹  If someone among you thinks he is wise in this age, let him become foolish so that he can become wise.

1 Corinthians 3:20

3:20 And again, “The Lord knows that the thoughts of the wise are futile.” ² 

[3:18]  ¹ tn Grk “let no one deceive himself.”

[3:20]  ² sn A quotation from Ps 94:11.