Matthew Henry Commentary John 6:60-65

"Many therefore of his disciples, when the heard [this], said, This is a hard saying; who can hear it? But Jesus knowing in himself that his disciples murmured at this, said unto them, Doth this cause you to stumble? [What] then if ye should behold the Son of man ascending where he was before? It is the spirit that giveth life; the flesh profiteth nothing: the words that I have spoken unto you are spirit, are are life. But there are some of you that believe not. For Jesus knew from the beginning who they were that believed not, and who it was that should betray him. And he said, For this cause have I said unto you, that no man can come unto me, except it be given unto him of the Father." — John 6:60-65 (ASV)

The human nature of Christ had not previously been in heaven, but being God and man, that wondrous Person was truly said to have come down from heaven. The Messiah's kingdom was not of this world; and they were to understand by faith what he had said about spiritually living by him and his fullness. Just as the flesh is of no value without the soul of man, so too, without the life-giving Spirit of God, all forms of religion are dead and worthless. He who made this provision for our souls, alone can teach us these things and draw us to Christ, that we may live by faith in him. Let us turn to Christ, thankful that it is declared that everyone who is willing to come to him shall be welcomed.