1 Corinthians 3:1, 18, 21
1 Corinthians 3:1 ASV
And I, brethren, could not speak unto you as unto spiritual, but as unto carnal, as unto babes in Christ.
1 Corinthians 3:18 ASV
Let no man deceive himself. If any man thinketh that he is wise among you in this world, let him become a fool, that he may become wise.