John 6:60-63

⁶⁰many, therefore, of his disciples having heard, said, 'This word is hard; who is able to hear it?'

⁶¹And Jesus having known in himself that his disciples are murmuring about this, said to them, 'Doth this stumble you?

⁶²if then ye may behold the Son of Man going up where he was before?

⁶³the spirit it is that is giving life; the flesh doth not profit anything; the sayings that I speak to you are spirit, and they are life;