I have heard this passage preached. Multiple ways. Two ways are errors.
The first error is that of the holiness gospel: the modern Cathars. This is that if you are still sinning you are carnal, fallen, and need to give your life over holy to Christ you will be perfect, without sin, in this life. This approach encourages despair in those who have sensitivity, for they consider their ways and note that their motivations are not good. There is darkness within, and that is the taint of Adam. However, this leads to churchian pride, as many account themselves as righteous and take pride in their holiness, forgetting that being a prig and proud of it will damn you.
The second error is the denial of the flesh and nature: the modern Gnostics. If you have the correct thoughts aand are a member of the progressive ilk, it matters not what you do, for your mind is pure. Your body is nothing, your mind is everything. This is seen in the postmodern post humanists: be those who wait for the convergence when their consciousness can be freed from their body and digitized, or those who want to be transunicorns. Both forget that the body is created good, and perfect, and for us.
The better position is to consider that in this life will never be perfect. We will always struggle. If Paul struggled, so will we: we will always be gloriously good and gloriously inconsistent.
And that it is confessed sins that are forgiven by God. Lord, forgive us our trespasses, including those we are too blind to see.
13Did what is good, then, bring death to me? By no means! It was sin, working death in me through what is good, in order that sin might be shown to be sin, and through the commandment might become sinful beyond measure.
14For we know that the law is spiritual; but I am of the flesh, sold into slavery under sin. 15I do not understand my own actions. For I do not do what I want, but I do the very thing I hate. 16Now if I do what I do not want, I agree that the law is good. 17But in fact it is no longer I that do it, but sin that dwells within me. 18For I know that nothing good dwells within me, that is, in my flesh. I can will what is right, but I cannot do it. 19For I do not do the good I want, but the evil I do not want is what I do. 20Now if I do what I do not want, it is no longer I that do it, but sin that dwells within me.
21So I find it to be a law that when I want to do what is good, evil lies close at hand. 22For I delight in the law of God in my inmost self, 23but I see in my members another law at war with the law of my mind, making me captive to the law of sin that dwells in my members. 24Wretched man that I am! Who will rescue me from this body of death? 25Thanks be to God through Jesus Christ our Lord!
So then, with my mind I am a slave to the law of God, but with my flesh I am a slave to the law of sin.
We are in this world. The people we interact with are pagan: they are of darkness, and they cannot tolerate that much truth. The light will bring their deeds to the light, and the fear of that drives them to double down on their rationalization. Many of those who are of the darkness are in the church: many of those are of the light are secular.
The labels we have are not as they are.
The only way forward is Christ. We need to look to him. We can learn from each other: the Calvinist pulls back to the text as the Orthodox reminds us of the sacrifice of the faithful. And the Catholic states that the doctors of the church all pointed to Christ.
But none of them preached peace in their time. THe preached being a witness, for the times were difficult. THis age is too much like that of Jeremiah, when the churchman preach progress, peace and calm as the enemy dreams of a world without the gospel, and all doomed to perdition.
So let us not grade each other as a kind of Christian. There is but one kind: fallen.
But we are not called to make ourselves perfect by force of will. It is the Spirit of God that allows us to do anything that is good. And he is faithful, and he bears witness to Christ. If you hear any other narrative, reject it.