The first few verses of Ro 7 clearly show that it is speaking of a former time. Verse 5..."For when we WERE in the flesh..."
The entire middle of Ro 7 is about Paul's former life as a Pharisee; trying to live the Mosaic Law, but failing. And again, a reference to the past in verse 18; (that is, in my flesh).
And the end, especially verse 23; "But I see another law in my members, warring against the law of my mind, and bringing me into captivity to THE LAW OF SIN which is in my members."...points again to a former time. Because....
we read in Romans 8:2...."For the law of the Spirit of life in Christ Jesus hath made me free from THE LAW OF SIN and death.
Why would Paul be subject to something he is free of?
If you could see the truth of Rom 7, and its proximity to Rom 6, which speaks of baptism and the death of the flesh, you would see that Paul is illustrating the past-present transition, and Rom 8 continues on into the life walked in the Spirit.
Paul is saying he was the worst of the now saved.
Why?
Because he persecuted the church!
Do you think he still was persecuting Christians?
Romans 7 debunks sinless perfectionism in my mind. He is talking about his struggles as a believer. It makes no sense that Paul was taking about his former self. The bible says that unbeliever are slave to sin (Ro 6:20), dead in sin (Eph 2:1), blinded by satan (2 Cor 4:4), don't understand the things of god (1 Cor 2:14), haters of god (Ro 1:30) and don't seek god (Ro 3:11). If Paul is talking about his past life here then why does he desire to do good? Romasn 7:19 says: For I do not do the good I want, but the evil I do not want is what I keep on doing.” Unbelievers do not desire to do good. In verse 22 Paul says he delights in the law of god. Unbelievers do not delight in gods law. In verse 25 he says the answer to his struggles is believe in Jesus. That he serves the law of god with his mind but the law of sin with his flesh. This is referring to his current life and not his former life. He never served the law of god. Only nonbelievers do not struggle with sin, believers do struggle with sin. The flesh is at war with the spirit in us and we will get new bodies without sin in them when we are in heaven.
Galations 5:16-17 KJV -
"This I say then, Walk in the Spirit, and ye shall not fulfil the lust of the flesh. For the flesh lusteth against the Spirit, and the Spirit against the flesh: and these are contrary the one to the other: so that ye cannot do the things that ye would."
This is talking to Christians that currently have sinful flesh. Our bodies are not made new, our mind is and our hearts are changed to desire to be sinless.
Sinless perfectionism denies the doctrine of sanctification.
1 Cor 3:1-3 - KJV (Paul calls believers carnal.)
"And I, brethren, could not speak unto you as unto spiritual, but as unto carnal, even as unto babes in Christ. I have fed you with milk, and not with meat: for hitherto ye were not able to bear it, neither yet now are ye able. For ye are yet carnal: for whereas there is among you envying, and strife, and divisions, are ye not carnal, and walk as men?
2 Peter 3:18 - KJV (Growing in Christ, we are not like Christ yet)
"But grow in grace, and in the knowledge of our Lord and Saviour Jesus Christ. To him be glory both now and for ever. Amen."
Philippians 1:6 - KJV
"Being confident of this very thing, that he which hath begun a good work in you will perform it until the day of Jesus Christ:
Romans 12:1-2
"I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service. And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God."
No one can tame the tongue James says, no one includes christians: James 3:8 - KJV
"But the tongue can no man tame; it is an unruly evil, full of deadly poison."
Jesus came for sinners Mt 9:13. You believe you can lose your salvation, I don't think we can because if we could lose it we would lose it. No one measures up to gods standards. You haven't either. Have you loved god perfectly, have you had a sinful thought in the last 14 years? We have a savior.