Who hath known the mind of the Lord? Since the spiritual man has been taught by God and follows His rules, so far as he is such, he can be judged by no one; for one who should judge him ought to be wiser or greater than the Spirit of God, so as to be able to penetrate and measure that Spirit. But who can do this? So Chrysostom. Nevertheless, the spiritual man often can be and ought to be judged, because he is not known to be spiritual in a given matter. Hence, in cxiv29 , he says, "Let the others speak two or three, and let the others judge." Moreover, many boast themselves to be spiritual who are merely natural, as, e.g, the Anabaptists. But S. Paul was confessedly spiritual, hence he adds, We have the mind of Christ—the wisdom of Christ which is spiritual and Divine, not natural and human. Our wisdom is not that of Plato or Pythagoras, but of Christ, who has infused His truths into our minds. So Chrysostom.
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For who among the sensual men of the world, hath known the mind of the Lord, so as to be able to instruct him, or them, whom he guides by his spirit.
But we, whom he has chosen to be his apostles, have the mind of Christ; having been taught and instructed by the Spirit of Christ. Some enthusiasts and fanatics pretend from this passage of St. Paul, that they being led and inspired by the spirit, can be judged by no one in matters of faith and religion. They pervert and wrest the words of St. Paul, as they do also other Scriptures, to their own perdition. (2 Peter iii. 16.) First, because no one knows by his pretended private spirit, that he is truly such a spiritual man, who has the Spirit of God in him: and many have too much reason to know by their sensual carnal lives, that they have it not. Secondly, St. Paul here speaks only of spiritual men in opposition to sensual men, and only says that they who are spiritual, have the spirit of discretion to judge what things are spiritual, an...
We know the things which are in the mind of Christ, which he has willed and revealed to us. This does not mean that we know everything which Christ knows but rather that everything which we know comes from him and is spiritual.