No. Paul says what he says!:
For what I want to do I do not do, but what I hate I do. 16 And if I do what I do not want to do, I agree that the law is good. 17 As it is, it is no longer I myself who do it, but it is sin living in me. 18 For I know that good itself does not dwell in me, that is, in my sinful nature.For I have the desire to do what is good, but I cannot carry it out. 19 For I do not do the good I want to do, but the evil I do not want to do—this I keep on doing
Please do not change the text. Paul is clearly saying that the "I" cannot, yes, cannot, do good.
Therefore, since Christians are to be molded into the image of Jesus, Paul cannot be talking about Christians here.
Get yourself an RSV.
14 We know that the law is spiritual; but I am carnal, sold under sin. 15 I do not understand my own actions. For I do not do what I want, but I do the very thing I hate. 16 Now if I do what I do not want, I agree that the law is good. 17 So then it is no longer I that do it, but sin which dwells within me. 18 For I know that nothing good dwells within me, that is, in my flesh. I can will what is right, but I cannot do it. 19 For I do not do the good I want, but the evil I do not want is what I do. 20 Now if I do what I do not want, it is no longer I that do it, but sin which dwells within me. 21 So I find it to be a law that when I want to do right, evil lies close at hand. 22 For I delight in the law of God, in my inmost self, 23 but I see in my members another law at war with the law of my mind and making me captive to the law of sin which dwells in my members. 24 Wretched man that I am! Who will deliver me from this body of death? 25 Thanks be to God through Jesus Christ our Lord! So then, I of myself serve the law of God with my mind, but with my flesh I serve the law of sin.
Paul says he sees in his members another law at war with the law of his mind, making him captive to the law of sin which dwells in his members. Is there a dualism there? The mind and the flesh? Perhaps Paul wanted to preach the gospel but he couldn't do it because he was tired. He could will himself to go on, but he could not do it. Maybe he was stressed. Maybe he was afraid. Maybe he wanted to keep something for himself and he couldn't give it up. Maybe he was hungry so he stole some food. He uses the word carnal so let's assume he had a carnal desire which made him want to do the thing he hated. I think we all know we would rather be comfortable. He could will himself to reject the carnal desire, but he could not do it.
My own experience is this. I like to go to the track. I don't know if it's a sin, but it takes me away from what I want to do which is to preach the gospel. Why do I go? I don't understand my own actions. I don't need the money. I like the rush that comes from winning. So my body produces the chemistry that makes me do what I don't want to do. I can will myself not to go, but I can not do it. Sooner or later I cave in. The law of sin dwells within me, that is, within the flesh. I can will what is right, but I can not do it. How many times have I neglected more important things to go to the track! Today we understand more about the flesh and the truth; the flesh produces chemicals - hormones which act on the flesh which lead to desires and cravings. Paul said it is no longer I that do it, I meaning the thinker and the speaker, but sin, the covetous desire, is doing it.
When we go to Romans 8 we see, 'therefore there is no condemnation for those who are in Christ Jesus. To set the mind on the Spirit is life and peace. For the mind that is set on the flesh is hostile to God; it does not submit to God's law, indeed it cannot; and those who are in the flesh cannot please God. But you are not in the flesh, you are in the Spirit, if the Spirit of God really dwells in you.'