60 When many of his disciples heard it, they said, "This teaching is difficult; who can accept it?" 61 But Jesus, being aware that his disciples were complaining about it, said to them, "Does this offend you? 62 Then what if you were to see the Son of Man ascending to where he was before? 63 It is the spirit that gives life; the flesh is useless. The words that I have spoken to you are spirit and life. 64 But among you there are some who do not believe." For Jesus knew from the first who were the ones that did not believe, and who was the one that would betray him. 65 And he said, "For this reason I have told you that no one can come to me unless it is granted by the Father."
Matthew Henry's Commentary on John 6:60-65
Commentary on John 6:60-65
(Read John 6:60-65)
The human nature of Christ had not before 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 of a spiritual living upon him, and his fulness. As without the soul of man the flesh is of no value, so without the quickening 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 unto Christ, that we may live by faith in him. Let us apply to Christ, thankful that it is declared that every one who is willing to come unto him shall be made welcome.