Romans 6:12-14 - A Living Sacrifice. Understanding the marvelous work Jesus did on the cross to solve our problems with the sin nature, we must now appropriate this work by faith in an act of dedication, once and for all, wherein we offer ourselves to God and all the members of our mortal body as His instrument to be filled and controlled by His Spirit in this resurrected life we have in Jesus. This is a decisive act of the will, also executed on the basis of faith.