Paul blessed the Corinthians at the end of his second letter when he wrote, “The grace of the Lord Jesus Christ and the love of God and the fellowship of the Holy Spirit be with you all” (2 Corinthians 13:14). Believers enjoy effectual favor from the Second Person of the Trinity, eternal affection from the First Person, and koinonia–fellowship–from the Third Person. God gave Himself for us, shares Himself with us, and brings us to Himself.
At the risk of oversimplification, all of these require relationship. Favor is given from the one to another, love lands on someone else, fellowship is shared between persons. We have communion by grace from love for fellowship, and it can’t be privatized.
The gospel drives us to do more than know about fellowship, it drives us into fellowship. Our liturgy each Sunday morning drives the same point. The call to worship is a call to delight in God’s presence. Our confession of sin deals with the hindrance to fellowship: sin. Christ was separated so that we could be reconciled. Our consecration includes asking Him for help because we know Him. We attend His Word because it helps us know Him better and makes us more like Him. Now we come to communion at the Lord’s Table where we have koinonia in the body of Christ and koinonia in the blood of Christ (1 Corinthians 10:16). “We who are many are one body, for we all partake of one bread” (1 Corinthians 10:17).
As He invites us together to share His life, so we learn to invite one another to share life. He doesn’t do it because He is morally obligated. He does it because He loves us. We don’t share our lives because it is ethically necessary. We do it because He increases our love and it results in our unity.