John Chrysostom
Then Christ adds, "Not that anyone has seen the Father, except Him who is from God." By the words "is from God," He means here not the cause of being, but the property of essence.
If He meant the former thought, in what would the Son's superiority and His distinction from us consist? For we also are all from God.
Why, you ask, did He not express this more clearly? Because of the weakness of the Jews.
If they were so scandalized even by the words, "I have come down from heaven," what would have happened to them if He had added this also?
Here again, by "vision," He means knowledge. He did not simply say, "No one knows the Father," and then fall silent.
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Otherwise someone might suppose this was said only about men. Wishing to show that neither angels, nor archangels, nor the powers above know the Father, He explained it by His addition.
For after saying, "Not that anyone has seen the Father," He added, "except Him who is from God; He has seen the Father."
If He had simply said, "no one," many of the hearers might perhaps have thought this was said only about our race.
But now, having said "no one" and added "only" the Son, by this addition of the Only-begotten He excluded every creature.
Someone will say, "Did He then exclude the Holy Spirit also?" No, for the Spirit is not part of creation.
The word "no one" is always used to exclude only creation. Likewise, when the Father is spoken of, the Son is not excluded.
And when the Son is spoken of, the Spirit is not excluded.
To show here that the word "no one" was not said to exclude the Spirit, but to remove creation, let us hear what Paul says about the same knowledge attributed to the Son alone.
Speaking with the Corinthians, what does he say? "For what man knows the things of a man except the spirit of the man that is in him?
Even so no one knows the things of God except the Spirit of God" (1 Cor 2:11).
As the word "no one" here does not exclude the Son, so the word "no one" spoken by Christ does not exclude the Holy Spirit.
From this the truth of what has been said is clear.
If in the words, "no one has seen the Father, except Him who is from God," the Spirit were excluded, Paul would have spoken in vain.
For he says that, just as a man knows what is within himself, so the Holy Spirit knows precisely the things that are in God.
"Not that anyone has seen the Father," the Lord says, "except Him who is from God; He has seen the Father."
"What follows from this?" they will say. "This saying still does not ascribe perfect knowledge to the Son.
That creation does not know the Father He expressed in the words, 'Not that anyone has seen the Father.'
That the Son knows Him, He likewise expressed by adding, 'except Him who is from God; He has seen the Father.'
But that He knows the Father perfectly, and as He knows Himself, has not yet been proved."
They may think that neither creation nor the Son knows Him fully. They may say that the Son has a clearer understanding of the Father than creation, yet still imperfect.
He said that He sees the Father as He is and knows Him. But they say that He has not yet declared that He knows Him perfectly and as He knows Himself.
Do you wish me to prove this also from the Scriptures, and specifically from the saying of Christ Himself?
Let us hear what He says to the Jews: "As the Father knows Me, so I know the Father" (Jn 10:15).