Firstly, I see that the fact that the words chosen by St. John in Greek, “sarx” and “trogo” are going to be ignored because the implication is obvious. There is no doubt that the Eucharist is
truly the Body and Blood of Christ. You won’t find one Christian within the first 500 years A.D. who believed otherwise. If you do the math, that means that when the Canon was set, there is not one Christian who was recorded as believing the Eucharist was symbolic.
Secondly,
Vatican II identifies the Mass as follows: ***“At the Last Supper, on the night He was betrayed, our Savior instituted the Eucharistic Sacrifice of His Body and Blood. He did this in order to perpetuate the sacrifice of the Cross throughout the centuries until he should come again, and so to entrust to His beloved spouse, the Church, a memorial of His death and resurrection: a sacrament of love, a sign of unity, a bond of charity, a paschal banquet in which Christ is consumed, the mind is filled with grace, and a pledge of future glory is given to us. (Sacrosanctum Concilium)” ***
Thirdly, and this is key: Non-Catholics believe that
John 6:53 is merely a symbol and not the actual presence of Christ. If Jesus were truly a symbol, then** verse 27 through 29 in 1 Cor. 11 **would not make sense. In this verse Paul states:
**(1 Cor. 11:27-29) **"***Wherefore whosoever shall eat this bread, and drink this cup of the Lord, unworthily, shall be guilty of the body and blood of the Lord." ******But let a man examine himself, and so let him eat of that bread, and drink of that cup. For he that eateth and drinketh unworthily, eateth and drinketh damnation to himself, not discerning the Lord’s body. ***
This is from Fr. Mitch Pacwa:
anawim.pair.com/CATHOLICS/CATHOLIC%20MASS.htm
So, if we add up these elements** 1)** St. John used the Greek words
sarx (literally flesh) and
trogo (literally to gnaw, munch) which are never used figuratively
2) No Christian, before or at the time that the Canon was set (and John 6 chosen as an inspired writing), believed that the Eucharist was symbolic (I can provide documentation from early Christians who discussed the fact that the Eucharist was truly the Body and Blood of Christ)
3) 1 Cor. 11:27-29 makes absolutely no sense if we are talking about a symbolic body and blood, someone who is being intellectually honest cannot deny the fact that those who believe the Eucharist is symbolic are wrong.