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The Holy Eucharist
The Real Presence — Body & Blood
Catholics believe the bread and wine at Mass truly become the Body and Blood of Jesus Christ — not a symbol or a mere reminder. This is what the Church has taught since the beginning, and it is exactly what Jesus and St. Paul say.
The short answer. Jesus didn't say “this represents my body.” He said “this IS my body,” and in John 6 he doubled down when people were scandalized instead of softening it to a metaphor.
Jesus said it plainly and repeatedly
In the Bread of Life discourse Jesus insists on eating his flesh and drinking his blood four times, using an increasingly graphic word for “eat” (Greek trōgō, to gnaw/chew). When the crowd recoils and many disciples leave, he does not call them back to explain a symbol — he lets them go. You don't let people walk away over a misunderstood metaphor.
John 6:53–56Jesus therefore said to them, “Most certainly I tell you, unless you eat the flesh of the Son of Man and drink his blood, you don’t have life in yourselves. He who eats my flesh and drinks my blood has eternal life, and I will raise him up at the last day. For my flesh is food indeed, and my blood is drink indeed. He who eats my flesh and drinks my blood lives in me, and I in him.
John 6:66At this, many of his disciples went back and walked no more with him.
He said it at the Last Supper
At the institution of the Eucharist Jesus identifies the bread and cup directly with his body and blood, and commands the apostles to repeat it. “This is my body” is the Church's warrant for the Mass.
Luke 22:19–20He took bread, and when he had given thanks, he broke and gave it to them, saying, “This is my body which is given for you. Do this in memory of me.” Likewise, he took the cup after supper, saying, “This cup is the new covenant in my blood, which is poured out for you.
Matthew 26:26–28As they were eating, Jesus took bread, gave thanks for it, and broke it. He gave to the disciples and said, “Take, eat; this is my body.” He took the cup, gave thanks, and gave to them, saying, “All of you drink it, for this is my blood of the new covenant, which is poured out for many for the remission of sins.
St. Paul treats it as truly the Body and Blood
Paul says receiving unworthily makes one “guilty of the body and blood of the Lord” — you cannot be guilty of desecrating a mere symbol. He calls the cup and bread a real “sharing” (koinōnia) in Christ's blood and body.
1 Corinthians 11:27–29Therefore whoever eats this bread or drinks the Lord’s cup in a way unworthy of the Lord will be guilty of the body and the blood of the Lord. But let a man examine himself, and so let him eat of the bread and drink of the cup. For he who eats and drinks in an unworthy way eats and drinks judgment to himself if he doesn’t discern the Lord’s body.
1 Corinthians 10:16The cup of blessing which we bless, isn’t it a sharing of the blood of Christ? The bread which we break, isn’t it a sharing of the body of Christ?
Common objections
“Jesus said ‘the flesh profits nothing’ (John 6:63) — so he meant it spiritually.”
He contrasts “the flesh” (fallen human judgment, as in ‘the flesh vs. the Spirit’) with “the Spirit,” not his own flesh with a symbol — he had just promised to GIVE that flesh ‘for the life of the world.’ If his flesh profited nothing, the Incarnation and the Cross would profit nothing. He means it must be received in faith, by the Spirit.
John 6:51I am the living bread which came down out of heaven. If anyone eats of this bread, he will live forever. Yes, the bread which I will give for the life of the world is my flesh.”
“It's obviously figurative, like ‘I am the door.’”
No one thought Jesus was made of wood when he said ‘I am the door,’ and no one left him over it. Here the audience takes him literally, argues, and leaves — and he confirms the literal sense rather than correcting them. That's the opposite of how the figurative sayings play out.
John 6:60Therefore many of his disciples, when they heard this, said, “This is a hard saying! Who can listen to it?”
Scripture quoted verbatim from the World English Bible (public domain).