In Romans 15, Paul called for unity among the followers of Christ, "that you may with one mind and one mouth glorify the God and Father of our Lord Jesus Christ" (v.6) From several Old Testament passages, he spoke of Gentiles and Jews together singing praise to God. A unity that had been considered impossible became reality as people who had been deeply divided began thanking God together for His mercy shown in Christ. Like them, we are filled with joy, peace, and hope "by the power of the Holy Spirit" (v.13). Unity among believers comes from our union with Christ.