The cup of blessing that we bless, is it not a participation in the blood of Christ? The bread that we break, is it not a participation 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
Love binds us together as believers and is a witness to the watching world. Paul reminds us that during the Communion, we mutually participate in the cross. We identify with Christ and proclaim that He died in our place to give us His righteousness. Unity must be guarded by excluding ungodly affiliations and divisions.