This is one of the most interesting passages dealing with the Lord’s Supper:
The cup of blessing that we bless, is it not a participation (fellowship) in the blood of Christ? The bread that we break, is it not a participation (fellowship) in the body of Christ? Because there is one bread, we who are many are one body, for we all partake of the one bread. (1 Corinthians 10:16-17 ESV)
What is the significance of the “one bread”?