Ephesians 4:1-5
1 “Therefore I, the prisoner of the Lord, urge you to walk in a manner worthy of the calling with which you have been called, 2 with all humility and gentleness, with patience, bearing with one another in love, 3 being diligent to keep the unity of the Spirit in the bond of peace. 4 There is one body and one Spirit, just as you also were called in one hope of your calling; 5 one Lord, one faith, one baptism, 6 one God and Father of all who is over all and through all and in all.”
Walk in a manner worthy: Paul spent the first three chapters writing about the believer’s identity in Christ. Now, he is transitioning into what Christian behavior ought to look like in light of identity in Christ. In order to walk in a worthy manner, we must understand the worth of our calling. Christians are not referred to in Scripture as sinners, but righteous and alive in Christ. Christian behavior, therefore, is not moralistic self-improvement to Paul. Instead, it is expressing the fruit of Christ being produced within us (see also Galatians 5:22-23). We can express this fruit because we are compatible with it (see 2 Peter 1:3-4; Romans 6:18).
Keep the unity of the Spirit: Paul doesn’t want the Ephesian church to try and conjure or build unity. Christian unity already exists in Christ. This is why Paul speaks of Christians belonging to one body, one Spirit, one hope, one Lord, one faith, and one baptism. We are in a constant state of oneness with God and one another. We are to preserve this unity by loving one another in light of it.
