britishbakeoffblues I apologise for my late response to your question, I was travelling with my family for the school holidays.
The key scriptural texts for Catholics regarding Holy Communion is John 6 (the whole chapter) which begins with the miracle of the loaves and fishes when Jesus physically feeds all the thousands of people present. In the next section from verse 22, the discourse in the synagogue of Capernaum, the people ask for a sign like that of the manna in the desert. Jesus then says that "I am the bread of life" (35) "I am the living bread which has come down from heaven. Anyone who eats this bread will live for ever; and the bread that I shall give is my flesh, for the life of the world" (51)
"Then the Jews started arguing among themselves, 'How can this man give us his flesh to eat?" Jesus replied to them:
In all truth I tell you,
if you do not eat the flesh of the Son of man and drink his blood, you have no life in you.
Anyone who does eat my flesh and drink my blood has eternal life,
and I shall raise that person up on the last day.
For my flesh is real food
and my blood is real drink.
Whoever eats my flesh and drinks my blood
lives in me
and I live in that person" (52-56)
"This is what he taught at Capernaum in the synagogue. After hearing it, many of his followers said, 'this is intolerable language. How could anyone accept it?" (59-60)
This was considered a very hard teaching and "After this, many of his disciples went away and accompanied him no more" (66). So from that time onwards there have been people who cannot accept this teaching of Jesus or want to say that communion is only metaphorical. But notice that Jesus does not correct his disciples or call back those that leave. In fact this is the only place in scripture where we read of disciples leaving him due to his own teaching. As Jesus says "but there are some of you who do not believe.' For Jesus knew from the outset who did not believe and who would betray him. He went on, 'This is why I told you that no one could come to me except from the Father" (64-65)
Following this we immediately have Peter's profession of faith (67-69) and the beginning of Judas turning away from Jesus. (70-71)
The ancient churches, the Catholics, Orthodox, Copts etc. all believe in the Real Presence of Christ. When we consider the language used by John, a literal interpretation—however disturbing—becomes even more obvious. In John 6:50-53 we encounter various forms of the Greek verb phago, “eating.” However, after the Jews begin to express incredulity at the idea of eating Christ’s flesh, the language begins to intensify. In verse 54, John begins to use trogo instead of phago. Trogo is a decidedly more graphic term, meaning “to chew on” or to “gnaw on". And it is in these verses that Jesus states clearly that his flesh is real food and drink. This is why Holy Communion is so sacred.
As this thread is dead you may like to start a new thread if you have further questions about Catholic beliefs, or feel free to PM me. In the love of Christ FdS x