1 Corinthians 3:1, 18, 21

And I, brethren, could not speak to you as to spiritual men, but as to men of flesh, as to infants in Christ.

Let no man deceive himself. If any man among you thinks that he is wise in this age, he must become foolish, so that he may become wise.

So then let no one boast in men. For all things belong to you