In broad terms Romans Chapters 1-11 has explained the work of Christ on the Cross for our sins and our new status as His children. Now in chapter 12 Paul explains that the logical outcome of this gift of forgiveness of sins and friendship with God is for us to present ourselves to God and to serve Him and His people. God’s recognises that when we come to faith in Jesus we bring all types of baggage with us. Some of it is good and some of it needs to be discarded. In effect we are exercising quality control over our lives so that our values and actions and motives increasingly conform to God’s revealed. God wants to use us and our lives and abilities in His service.