John 6:57-63

I live because of the living Father who sent me; in the same way, anyone who feeds on me will live because of me. I am the true bread that came down from heaven. Anyone who eats this bread will not die as your ancestors did (even though they ate the manna) but will live forever.” He said these things while he was teaching in the synagogue in Capernaum. Many of his disciples said, “This is very hard to understand. How can anyone accept it?” Jesus was aware that his disciples were complaining, so he said to them, “Does this offend you? Then what will you think if you see the Son of Man ascend to heaven again? The Spirit alone gives eternal life. Human effort accomplishes nothing. And the very words I have spoken to you are spirit and life.