Romans 15:5-6

Now may the God who gives endurance and who supplies encouragement grant that you be of the same mind with one another according to Christ Jesus, so that with one accord you may with one voice glorify and praise and honor the God and Father of our Lord Jesus Christ. 

When the body of Christ is unified, it becomes a mighty force for good. Our strength as a church today keeps evil out of our neighborhoods, towns, cities, and countries. We are to pray for one another and help the weak among us. God encourages us and lets us work together to encourage others.