In Romans 6:1-14 Paul discusses the incongruity of continuing in sin that grace might abound.

Baptism is a once for all identification with the death of Christ (v3). Because we have shared in His death we can enjoy newness of life, an ongoing walk of a fresh new kind guaranteed by His resurrection (v4).

If we have grown into and continue to enjoy an experience of something corresponding to His death then we will also experience His resurrection life (v5), our old man having been crucified once for all so that our body of sin has also been rendered powerless, so we are no longer enslaved to sin (v6); because we have died we have been and continue to be acquitted of sin (justified) (v7).

Just as surely as Christ has been raised from the dead and He is now alive for evermore, and death no longer rules as lord and master over Him, we will live with Him (vv8,9). In the same way that Christ died to sin and now lives to God we are to consider ourselves dead to sin, but alive to God (vv 10,11).

Therefore we are not to let sin continue to reign in these passing mortal bodies of ours (v12). We must stop presenting the parts of our body to sin for it to use as tools for unrighteousness, and instead make a determined once for all presentation of ourselves to God as those who have experienced our own resurrection from the dead, that the members of our body should be tools for God to use for righteous purposes (v13). Sin shall not rule over us as lord and master because we are under God's grace not under the Law (v14).

{See Appendix for a fuller discussion of Romans 6}