I've noticed that most Protestants are weak in moral theology, beyond "smoke not, drink not, dance not" in some of them.
I suggest you read CALLED TO BE HOLY.
Suggestion overruled as the scriptures state.....
2 Timothy 3:16-17
16All scripture
is given by inspiration of God, and
is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
17That the man of God may be perfect, throughly furnished unto all good works.
You need nothing but scriptures for this endeavor as it is complete and sufficient for the task as it says.
Anything else are interpretations, tangents, and philosophy.
Okay so Paul says in Romans 6:1 that we should not continue to sin while we are being saved. General Church teaching is that we should repent of our sins and no longer sin. But wait! Doesn't everyone still sin while we are in the flesh? And isn't biblical repentance a change of mind about Jesus? Or am I missing something here? Just what is not living in sin exactly? Since everyone sins before and after their rebirth.
It's more or less a matter of spiritual growth. Spiritual maturity if you will as we grow in grace. When we come to Christ initially, we are but babes, children, no matter our age.
1 Corinthians 3:1(BSB) Brothers, I could not address you as spiritual, but as worldly—as infants in Christ.
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:
As you continue, you will spiritually mature and grow in your relationship with God.
For even Paul acknowledges there are things he doesn't want to do, yet he still does and vice versa.
Romans 7:13-25 explores his struggle with sin quite well.
The spirit is always at war with the flesh.
Romans 7:24-25 though says it well to conclude...
24O wretched man that I am! who shall deliver me from the body of this death?
25I thank God through Jesus Christ our Lord. So then with the mind I myself serve the law of God; but with the flesh the law of sin.
A commentary I found that does a great job expanding on this premise...
Matthew Henry Commentary
7:18-22 The more pure and holy the heart is, it will have the more quick feeling as to the sin that remains in it. The believer sees more of the beauty of holiness and the excellence of the law. His earnest desires to obey, increase as he grows in grace. But the whole good on which his will is fully bent, he does not do; sin ever springing up in him, through remaining corruption, he often does evil, though against the fixed determination of his will. The motions of sin within grieved the apostle. If by the striving of the flesh against the Spirit, was meant that he could not do or perform as the Spirit suggested, so also, by the effectual opposition of the Spirit, he could not do what the flesh prompted him to do. How different this case from that of those who make themselves easy with regard to the inward motions of the flesh prompting them to evil; who, against the light and warning of conscience, go on, even in outward practice, to do evil, and thus, with forethought, go on in the road to perdition! For as the believer is under grace, and his will is for the way of holiness, he sincerely delights in the law of God, and in the holiness which it demands, according to his inward man; that new man in him, which after God is created in true holiness.
Keep fighting the good fight.