I love the Greek word Paul uses for "make every effort" — try to say it, "spoudazow"; it even sounds passionate! Why is "every effort" so necessary? Well, there are many reasons, but the one that the Holy Spirit wants us to recognize from this passage is this: We all share in the same Holy Spirit, who is spiritual DNA that connects us together. The Holy Spirit is at work to create the unity and harmony necessary to help us function together as the bodily presence of Jesus in our world. For that to happen, there needs to be a unity that includes peace. A body can't function when it attacks itself or won't communicate among its different parts. So we must all, individually and collectively, "make every effort" to preserve what the Holy Spirit has built and is working to hold together. To do less is to rebel against the work of God!