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