I happened to come across 1 Corinthians 10, 16 again. As you know, many non-Catholic denominations believe that the bread and wine (or grape juice in their case) as offered by the Lord are only symbolic of his body and blood. If it's true, tell me if Paul would have written the above-mentioned verse the way it is?
The verse: "Is not the cup of blessing we bless a sharing in the blood of Christ? And is not the bread we break a sharing in the body of Christ?"