Romans 15:5-6 NIV
May the God who gives endurance and encouragement give you a spirit of unity among yourselves as you follow Christ Jesus, so that with one heart and mouth you may glorify the God and Father of our Lord Jesus Christ.

This scripture reminds me of the great prayer of Jesus in John 17. The unity of the people in the church is very important to God. It's is our unity that validates His presence in the church and therefore brings glory to him. The unity we have in not uniformity. The church is an organic whole in which persons live unified by one Spirit, one faith, one Lord. Anything less deprives God of glory, and the church of credibility in a world that needs both.