Romans 6:12-14 (ESV Strong's)
12 Let not sin therefore reign in your mortal body, to make you obey its passions. 13 Do not present your members to sin as instruments for unrighteousness, but present yourselves to God as those who have been brought from death to life, and your members to God as instruments for righteousness. 14 For sin will have no dominion over you, since you are not under law but under grace.
Before we received the grace of Christ, we had no power to resist sin. We were slaves to the whims and passions of our mortal bodies. Now we have a choice on how we live. We can live a life that ends in death or live a life that never ends. That’s the power of grace.