For. — This is the proof that the enlightened spiritual man cannot be judged by any one who is not thus enlightened. “Who (thus uninstructed) can know the mind of the Lord Jesus, that he may instruct Him?”
But we. — That is, spiritual men, including the Apostles. The Apostle here identifies Christ with the Spirit, whom he has previously spoken of as the Teacher of spiritual things. He does not mean to assert that the Apostles knew all that the mind of Christ knew, but that all things which they did know were from Him and spiritual (John 15:15).