And my calling the Lord's Supper, or Communion a metaphor does not mean I don't take it seriously.
So did Jesus say to them, "I didn't mean it, guys. I was just kind of, you know, using hyperbole or metaphor." No. He actually intensifies the scandal. He actually raises the obstacle even higher. "He said to them, 'Truly, truly, I say to you unless you eat the flesh of the son of man and drink his blood,' which Leviticus condemns, the drinking of blood, 'unless you eat my flesh and drink my blood, you have no life in you. He who eats my flesh and drinks my blood has eternal life and I will raise him up on the last day. For my flesh is food indeed and my blood is drink indeed. He who eats my flesh and drinks my blood abides in me and I in him.'"He said that four times in four different ways.
In verse 60, "Many of His disciples when they heard it said, 'This is a hard saying. Who can listen to it?'" That is an understatement. "Jesus, however, knowing in Himself that His disciples murmured at it" (the disciples, the followers, the spiritual proteges, not just the crowd now, the disciples themselves are taking offense at this and murmuring and grumbling), "said to them, 'Do you take offense at this? Then what if you were to see the son of man ascending to where He was before? It is the Spirit that gives life; the flesh is of no avail. The words that I have spoken to you are spirit and life.'"
What words? That you've got to eat my flesh and drink my blood, those words.
If you would be interested in reading his entire, biblically based argument, you can check out the thread at: The Institution of the Eucharist in Scripture
God bless. We are all believers in Jesus Christ, the only begotten Son of God. I appreciate the respectful and prayerful debate.