In Romans 15:5-6, Paul pronounces a benediction of unity upon his readers. The benediction encourages them to live in harmony and to welcome each other. Unity among believers matters because it brings glory to God, it follows the example of Christ, and it is the gift of the Holy Spirit. Our Unity should be a witness to a watching world (John 17:20-23). We are to be a unified body, a family, a fellowship.
May the God of endurance and encouragement grant you to live in such harmony with one another, in accord with Christ Jesus, that together you may with one voice glorify the God and Father of our Lord Jesus Christ.Romans 15:5-6 (ESV)