For sin shall not be your master, because you are not under law, but under grace.
What then? Shall we sin because we are not under law but under grace? By no means!
Some mistake God’s grace as a license to sin because all is forgiven. Paul had to deal with the notion that people should sin because it brought about more grace and if grace was good, more grace was better.
Nothing could be further from the truth however. Because we are under grace and no longer subject to the law does not mean that we can do as we please now. If anything, it means that we should strive even harder to live a righteous life because we have the Holy Spirit as an aid and guide.
Paul goes on to explain in Romans 6 that we were once slaves to sin. We were under its control and could not help but sin. Because of grace we are free from sin but this doesn’t mean that we are free to do as we please.
Instead we are now slaves to righteousness. We want to do what is right because God is our Lord and Jesus our Savior. While we continue to struggle with sin, we should no longer be mastered by it and instead bow only to our Lord.