and with diligence to preserve the unity of the Spirit through the bond of peace. — Ephesians 4:3

Paul urges you to keep the unity of the Spirit—not manufacture it, because the Spirit has already made it. There's one body and one Spirit, just as you were called to one hope. Through Christ, both Jew and Gentile have access by one Spirit to the Father. Your job is to walk in a manner worthy of this unity, loving the brothers with a pure heart.