But I said to you that you have seen me and yet do not believe.
36. But I have told you. He now reproves them for wickedly rejecting the gift of God, which is offered to them. Now, that man is chargeable with wicked contempt of God, who rejects what he knows that God has given him.
Christ let them question Him freely, no small condescension. The wise teacher listens swiftly and turns even foolish questions toward what profits. These Galileans asking "What shall we do?" show a teachable mind, unlike the Judean critics who came only to cavil. He answers the sincere request, not the impertinent quibble.
AI summary
Commenting on John 6:28-59
All that the Father giveth me,.... The "all" design not the apostles only, who were given to Christ as such; for these did not all, in a spiritual manner, come to him, and believe in him; one of them was a devil, and the son of perdition; much less every individual of mankind: these are, in some sense, given to Christ to subserve some ends...