Conflict is an ongoing part of life today, just as it was for the church at Ephesus. In this sermon on the unity of the Spirit from Ephesians 4:2–3, Dr. Martyn Lloyd-Jones opens Paul’s letter to the Ephesians and addresses how believers can live in unity and peace. Rather than ignore sin or avoid confrontation, Christians must quickly exhort and forgive one another, guarding the unity of the Spirit, and guarding the fellowship of believers. This is supernatural unity that can only belong to those indwelt with the Spirit. Therefore, to not guard this unity is actually a grievance to the Holy Spirit. So how can one guard Holy Spirit’s unity? Dr. Lloyd-Jones proclaims that being humble, gentle, patient, and bearing with one another are critical characteristics of believing relationships. Christian brothers and sisters must do this because they love one another and desire to guard their unity. Just as parents humbly serve and instruct their children with patience and gentleness, Christians must do the same thing with their brothers and sisters in Christ.

http://www.mljtrust.org/sermons/keeping-the-unity-of-the-spirit/