“Can a married woman live as though she were still single? Well, yes, I suppose she could. It is not impossible. But let her remember who she is. Let her feel her wedding ring, the symbol of her new life of union with her husband, and she will want to live accordingly. Can born-again Christians live as though they were still in their sins? Well, yes, I suppose they could, at least for a while. It is not impossible. But let them remember who they are. Let them recall their baptism, the symbol of their new life of union with Christ, and they will want to live accordingly.
“So the major secret of holy living is in the mind. It is in knowing that our former self was crucified with Christ (Rom 6:6), in knowing that baptism into Christ is baptism into his death and resurrection (6:3) and in considering that through Christ we are dead to sin and alive to God (6:11). We are to recall, to ponder, to grasp, to register these truths until they are so integral to our mindset that a return to the old life is unthinkable. Regenerate Christians should no more contemplate a return to unregenerate living than adults to their childhood, married people to their singleness, or discharged prisoners to their prison cell. For our union with Jesus Christ has severed us from the old life and committed us to the new. Our baptism stands between the two like a door between two rooms, closing on the one and opening into the other. We have died, and we have risen. How can we possibly live again in what we have died to?”
– John Stott, The Message of Romans (IVP 1994), at 179-180