But if our unrighteousness serves to show the righteousness of God, what shall we say? That God is unrighteous to inflict wrath on us? (I speak in a human way.) By no means! For then how could God judge the world? But if through my lie God’s truth abounds to his glory, why am I still being condemned as a sinner? And why not do evil that good may come?—as some people slanderously charge us with saying. Their condemnation is just. Romans 3:5-8
I remember hearing about a pastor that would stand at the pulpit with a bible, a bottle of whisky and a glass. He would drink the whisky during the sermon with his point that he was saved and even his willing sin was covered. He was right, to a point. Yes all our sins are covered even those we are yet to commit. And yes, some of them we will willingly commit. We are still a work in progress and our sinful nature is still there.
Evidently something similar was going on during Paul’s time. I would guess the thinking goes something like this: God’s glory is shown through His saving grace, so the more I sin the more I receive God’s grace and the more God is glorified. Not exactly what God had in mind. God is self sufficient He does not need us to show His glory it is everywhere in His creation. He has angels to glorify Him. As with everything about God His glory is complete. We can neither add to nor subtract form God’s glory.
When we sin we do not show others Gods grace but our own disobedience. The unbeliever sees not God’s grace but someone no different than they are and maybe a bit worse. Our purposeful sinning will in all likely hood cause the unbeliever to think he does not need God.
Early Christians were thought to be cannibals because of misunderstanding of the celebration of the Last Supper and viewed as atheist because they refused to worship the Roman and Greek gods. Paul was fighting these misconceptions by outsiders as well as trying to get new believers to abandon their old ways. His struggle was further complicated by false teachings such as Christians could because their sins were forgiven sin at will.
Yes, our sins are forgiven, even ones we have yet to commit. No, this does not give us license to sin. We need to be open to the moving of the Holy Spirit to change us and move us from our old life of sin to a new life in heaven.
Have a blessed day,