In Romans 15:8-13, Paul shows how Christ's ministry strengthens Christian unity. Jesus serves the Jews by confirming God's promises, extends mercy to the Gentiles so that all nations may rejoice, and fills His people with joy, peace, and hope through the power of the Holy Spirit. Because Christ has served both Jews and Gentiles, the church should welcome one another in Christ-centered unity, rejoicing together in God's faithfulness, mercy, and empowerment