Unity is a key topic that Paul discusses in his letter to the Ephesians. He teaches that through Christ, all people can be united regardless of race or culture. This unity involves all spheres of life, including the church, relationships, family, and work. God's plan is to bring everything under Christ's authority so that all of His children can be one. Maintaining unity requires humility, gentleness, peace, and submitting to one another through respect and love. When believers come together in this spirit, it glorifies God.