The unity of the Spirit in the bond of peace is certainly the gift of God. But St. Paul considers a great deal of human effort to be necessary for its maintenance. It does not take care of itself. Fr. Pat fleshes this out.
These sermons are from All Saints Antiochian Church in Chicago, IL, preached by Fr. Patrick Reardon. If you enjoy these homilies, you might also be interested in reading Fr. Pat’s Daily Reflections on Holy Scripture.