John 6:59-65

He said these things while teaching in the meeting place in Capernaum. Many among his disciples heard this and said, “This is tough teaching, too tough to swallow.” Jesus sensed that his disciples were having a hard time with this and said, “Does this rattle you completely? What would happen if you saw the Son of Man ascending to where he came from? The Spirit can make life. Sheer muscle and willpower don’t make anything happen. Every word I’ve spoken to you is a Spirit-word, and so it is life-making. But some of you are resisting, refusing to have any part in this.” (Jesus knew from the start that some weren’t going to risk themselves with him. He knew also who would betray him.) He went on to say, “This is why I told you earlier that no one is capable of coming to me on his own. You get to me only as a gift from the Father.”