15 And let the peace of Christ rule in your hearts, to which indeed you were called in the one body. And be thankful. 
The wonderful acknowledgement that we have eternal life in Christ. He has overcome this world so that we do not need to fear the trails. That peace in practice of love, forgiveness and graciousness, the Christian community is to be our showcase of the reconciliation that Christ has brought to the universe, and to individual sinners. We have this great truth, and this alone should compel us to share with everyone. The church should operate as one body, moving forward standing upon the bible for its authority.