John 6:59-64

59He said these things in a synagogue while He was teaching in Capernaum.

60When many of His disciples heard this, they said, “This is a difficult and harsh and offensive statement. Who can [be expected to] listen to it?”

61But Jesus, aware that His disciples were complaining about it, asked them, “Does this cause you to stumble and take offense?

62What then [will you think] if you see the Son of Man ascending to [the realm] where He was before?

63It is the Spirit who gives life; the flesh conveys no benefit [it is of no account]. The words I have spoken to you are spirit and life [providing eternal life].

64But [still] there are some of you who do not believe and have faith.” For Jesus knew from the beginning who did not believe, and who would betray Him.