John 6:60-64

When the followers of Jesus heard this, many of them said, “This teaching is hard. Who can accept it?” Knowing that his followers were complaining about this, Jesus said, “Does this teaching bother you? Then will it also bother you to see the Son of Man going back to the place where he came from? It is the Spirit that gives life. The flesh doesn’t give life. The words I told you are spirit, and they give life. But some of you don’t believe.” (Jesus knew from the beginning who did not believe and who would turn against him.)