^61-64a Then Jesus, knowing intuitively that his disciples were complaining about what he had just said, went on, “Is this too much for you? Then what would happen if you were to see the Son of Man going up to the place where he was before? It is the Spirit which gives life. The flesh will not help you. The things which I have told you are spiritual and are life. But some of you will not believe me.”

^64b-65 For Jesus knew from the beginning which of his followers did not trust him and who was the man who would betray him. Then he added, “This is why I said to you, ‘No one can come to me unless my Father puts it into his heart to come.’”