John 6:61-63

⁶¹But Jesus, aware that his disciples were murmuring about it, said to them,

⁶²“Is this a hindrance to you? What, then, if you should see the Son of Man ascending where he was before?

⁶³It is the Spirit that gives life; human strength achieves nothing. In the teaching that I have been giving you there is Spirit and there is life.