Probably no other passage is more descriptive of the church in action than Ephesians 4. Ephesians breaks into two segments of three chapters each. Ephesians 1-3 is the gospel story. Ephesians 4-6 explains how the gospel story should be lived out together as a church. How are we, as Christ’s church, to live, serve, and grow together? The surprising answer is, “with all humility and gentleness, with patience, bearing with one another in love, eager to maintain the unity of the Spirit in the bond of peace” (Ephesians 4:2-3). This unity, built on core doctrine (4:4-6) overflows into service towards one another that builds up (4:7-16).
When the church walks in a manner worthy of the calling to which they’ve been called (4:1), they are the answer to Jesus’ prayer in John 17:20-23. “I do not ask for these only, but also for those who will believe in me through their word, that they may all be one, just as you, Father, are in me, and I in you, that they also may be in us, so that the world may believe that you have sent me. The glory that you have given me I have given to them, that they may be one even as we are one, I in them and you in me, that they may become perfectly one, so that the world may know that you sent me and loved them even as you loved me.”