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 14:21

14:21 It is written in the law: “By people with strange tongues and by the lips of strangers I will speak to this people, yet not even in this way will they listen to me,” ²  says the Lord.

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

[14:21]  ² sn A quotation from Isa 28:11-12.