And go back to John 6. In every other instance when Jesus knew who he was teaching didn't understand, he stopped an gave a parable or another way of teaching.Back to the topic though; if Jesus said 'this is My body' and 'this is my blood', I can appreciate the CC stance that it 'is' by faith, not that it merely is symbolic. Since there is excellent Scriptural basis from the very words of Jesus Christ - I'm not going to say they are in error on that one!
In John 6, what did he say. Stop the murmuring and didn't stop and tell them, hey don't get upset it was just a symbol. They said it was hard teaching and left.
Then God spoke to Peter and said you are the Messiah who have the words of everlasting life. What were those words that God gave only Peter the meaning of.
"Unless you eat my flesh and drink my blood you have no life in you."
What did Jesus reply? Only my Father could have let you know this. The only time God spoke to one of the 12 and it was to show him this is not a symbol.