I found this devotional online that addresses the sinning while being a Christian issue. It very clearly addresses misrepresentation of Christian beliefs that assurance of salvation and the security of the believer is a license to sin.
FWIW, people who think that others free in Christ think that way are merely projecting. They are revealing what they in their hearts would do if they had assurance and security in their salvation, so they think everyone else would be an opportunist as well.
It’s also ironic that we are so often accused and condemned as Bible literalists and yet when we show the clear, concise teaching of Scripture to counter a false belief someone is spreading about what we believe, it’s completely ignored.
That aside…..
https://www.gcu.edu/blog/spiritual-life/weekly-devotional-shall-we-sin-grace-may-abound
Weekly Devotional: Shall We Sin That Grace May Abound?
Sin. It’s something most of us would rather not think about. For the unsaved person, sin is something that separates them from God, due to his perfect holiness. Yet for the Christian, their sin has been paid for. When God looks at them, he doesn’t see their sin, but instead righteousness.
How can that be? The answer is Jesus.
Jesus took the place of us on the cross. He paid the price of our sins with his very life and his holiness was accounted to us (2 Corinthians 5:21). God made it possible for us to be with him through the blood of his holy Son. Instead of condemnation, we receive grace. Instead of rightful punishment for our sins, God sees us as his sons and daughters. Indeed, this is the miracle of the Christian faith for all who believe.
But this brings up an important question. If our sin is already paid for, why should we stop sinning? In fact, doesn’t the vastness of our sin just make his grace more beautiful? Shall we sin that grace may abound?
Shall We Continue in Sin?
Paul demolished this dangerous line of thought in Romans 6. Christ died to free us from sin, not enable us to sin. When Jesus died, he was releasing us from our bondage to sin, because that is what sin is — slavery. Sin is what separates us from God. It’s damaging, and for the unredeemed, it is damning (Romans 6:23).
“For we know that our old self was crucified with him so that the body ruled by sin might be done away with, that we should no longer be slaves to sin — because anyone who has died has been set free from sin.” – Romans 6:6-7
So, shall we then continue in sin that grace may abound? Paul replies with a resounding “God forbid” (Romans 6:2). To desire to continue in sin shows a misunderstanding of this abundant grace and a contempt for Jesus’ sacrifice. Either we believe what God says is true or we don’t. Either we take him at his word when he equates sin to death, or we do not believe him at all (Ephesians 2:1).
What is the point of the Christian faith if we get to pick and choose what we want to believe? Do we think God is that small, insignificant or somehow uninformed? Do we trifle with the very thing that God sent his Son to save us for? Do we misuse the grace that he gifted us with in his death and resurrection? Surely not.
Sin and Grace
Grace is a gift. Forgiveness of sins and his salvation are gifts. Grace is not, however, a license to sin. Throughout the Bible, fathers of our faith are seen distressed, tormented by their sin.
Consider David after his adultery with Bathsheba or Peter after denying Christ (Psalms 51:17 and Matthew 26:75). They did not discount their sin as simply something atoned for. Just because the Christian’s sin is paid for by Jesus, sin is still damaging to the believer and their relationship with God.
When David tried to ignore his sin, his “bones wasted away through my groaning all day long” (Psalms 32:3). He did, however, find freedom in confession.
“Then I acknowledged my sin to you and did not cover up my iniquity. I said, ‘I will confess my transgressions to the LORD’ – and you forgave the guilt of my sin.” – Psalms 32:5
A Christian who pursues sin despite claiming Christ as their Savior is living outside the blessing and fullness of the relationship that comes with an obedient life. We cannot equate grace with freedom to sin. Instead, we should be thankful that grace provides freedom from sin and its eternal consequences.
Doesn’t that kind of grace make you want to obey the one who set you free?
What Is Sanctification?
“If you love me, you will obey my commandments. I will ask the Father, and he will give you another helper who will be with you forever. That helper is the Spirit of Truth. The world cannot accept him, because it doesn’t see or know him. You know him, because he lives with you and will be in you.” – John 14:5-17
The Christian’s spiritual journey doesn’t begin and end at a one-time prayer of confession. When we truly see our need for God, his grace and Christ’s sacrifice for us, we will want to obey him. Why? Because we will overflow with love and gratitude that the God of all creation cares enough to save us from ourselves. And if we love him, we trust him when he calls us to higher things. This pursuit toward Christ, and refining of our faith, is sanctification. Sanctification is progressing toward Christlikeness. A Christian cannot pursue both Christlikeness and sin.
So Christians, remember his abounding grace toward you. Turn from sin and embrace your new life as a vessel of light. You are dead to sin, alive in Christ.
Now go live it.
Your post here is well put to give in exquiste unassailable details of what having salvation and oneself knowing beyond question that one is saved by faith alone in the person and works of Christ alone has one visible mark seen by all, and that is the other side of the same coin, and that is the 180 degree change of mind of the one exercising that permanent abiding faith, called "repentance."
One who has been scripturally warned, but thinks that as an infant he/she was saved from perdition, thinks he/she need not change one's mind about one's status with God, thinks one can keep in a lifestyle of habitually repeated sins yet from time to time confess the same ones to a cleric (who has no authority to remit any except those done to him) and not to God--that person most likely has never experienced the life-changing repentance arising from a changed belief; and thus cannot be assured of salvation, because he/she simply cannot obtain it from the religion that he/she has been persuaded to have a strong but false confidence in.
It is exactly such a person who thinks he/she is "Christian" but keeps on showing the world by a lifestyle that he/she is not, but wrongly condemns others not of the same cult for.
It is just such conduct and guiltiness that members of that cult project on "Protestants" who can truly KNOW that they are saved and engaged in progressive sanctification from a basis of belief, changed mind, irrevocable salvation, and justification, with the imputed righteousness due to a child of he Heavenly Father.
Until those cultists admit their standing as condemned depraved ill-catechized descendants of Adam still having Satan their master, there can be no salvation, let alone assurance of it.
That is the negative side of believing in a false religion with false doctrines, and false prophets preaching them without cessation.
The invitation to such lost but ignorant souls is that of Jesus, the Friend of depraved sinners like as I have been until chastened by The Father of our Savior:
27"All things are delivered unto me of my Father: and no man knoweth the Son, but the Father; neither knoweth any man the Father, save the Son, and he to whomsoever the Son will reveal him.May someone's spiritual blindness be removed by the meditation you have labored to present. Your effort in this is the undertaking of the "light burden" that Jesus requests of His true disciple-FRiends. May our Heavenly Father bless both you and we the diligent readers, my dear metmom.
28Come unto me, all ye that labour and are heavy laden, and I will give you rest.
29Take my yoke upon you, and learnofἀπό = from me; for I am meek and lowly in heart: and ye shall find rest unto your souls.
30For my yoke is easy, and my burden is light" (Mt. 11:27-30 AV; bolding added for emphasis).