John 6:61-63
Read this passage and open each verse for the full verse feed and commentary tools.
61But Jesus knowing in himself that his disciples murmured at this, said unto them, Doth this cause you to stumble? 62[What] then if ye should behold the Son of man ascending where he was before? 63It is the spirit that giveth life; the flesh profiteth nothing: the words that I have spoken unto you are spirit, are are life.
John 6:61-63 (ASV)