For millions of non-Catholic Christians, Jesus was using pure symbolism in John 6:53 when he declared to his followers, “Truly, truly, I say to you, unless you eat the flesh of the Son of man and drink his blood, you have no life in you.” The reasons non-Catholics give can usually be boiled down to these: First, a literal interpretation would make Christians into cannibals. Second, Jesus claims to be a “door” in John 10:9 and a “vine” in John 15:5. Do Catholics believe they must pluck a leaf from Jesus the vine or oil the hinges on Jesus the door to get into heaven? So the non-Catholic claims Jesus is using metaphor in John 6, just as he does elsewhere in the Gospels.
Catholic Cannibals?
The charge of cannibalism does not hold water for at least three reasons. First, Catholics do not receive our Lord in a cannibalistic form. Catholics receive him in the form of bread and wine. The cannibal kills his victim; Jesus does not die when he is consumed in Communion. Indeed, he is not changed in the slightest; the communicant is the only person who is changed. The cannibal eats part of his victim, whereas in Communion the entire Christ is consumed—body, blood, soul, and divinity. The cannibal sheds the blood of his victim; in Communion our Lord gives himself to us in a non-bloody way.
Second, if it were truly immoral in any sense for Christ to give us his flesh and blood to eat, it would be contrary to his holiness to command anyone to eat his body and blood—even symbolically. Symbolically performing an immoral act would be of its nature immoral.
Moreover, the expressions to eat flesh and to drink blood already carried symbolic meaning both in the Hebrew Old Testament and in the Greek New Testament, which was heavily influenced by Hebrew. In Psalm 27:1-2, Isaiah 9:18-20, Isaiah 49:26, Micah 3:3, and Revelation 17:6-16, we find these words (eating flesh and drinking blood) understood as symbolic for persecuting or assaulting someone. Jesus’ Jewish audience would never have thought he was saying, “Unless you persecute and assault me, you shall not have life in you.” Jesus never encouraged sin. This may well be another reason why the Jews took Christ at his word.
