Thank you for another post. If Jesus only died for our past sins, we must live our lives under righteousness of obeying the law. I would say that is an indisputable fact.My point is that now that we are forgiven for transgressions that are past, Romans 3:25, not now free to continue to transgress.
The Law is not there for the man that is, by nature, keeping the righteousness of the Law.
But, if a man is not keeping the righteousness of the Law, as a believer, the Law is to be used lawfully.
It is also to be used for doctrine and instruction (1Tim 3:16). If a man is disobeying (1Tim 1:9) the Law of GOD we can reprove and correct (1Tim. 3:16) such a one with the Law, or Word (and prayer of course).
This is my point and I believe that if you read the scriptures I have shared you will better understand my point. If you find my understanding in error, please use the Word, in context, to correct me.
I will speak concerning personal experience when young in regard to rest of your post. I was raised in a church, that led me to believe Jesus died for my past sins. The slate was wiped clean if you like at conversion. But after then, I must not sin/break the law or my salvation was in jeopardy. I responded to an altar call when I was ten. Everything then changed. I became aware of my shortcomings/sin, in a most profound way before God. I got angry at times, as kids do. I told some fibs, I did not love others as I should, and all the time I felt bad about these things. But when I reached puberty, my problems magnified tenfold. I had to obey God's laws, or my salvation was in jeapordy. On the outside I could act as Godly as anyone else on Sundays at church. But the inside was a different matter. And sin is sin, whether committed where everyone could see, or whether it was known only to me and God. I feared my impure thoughts when they came, because God's laws must be obeyed, and I was not obeying them on the inside. I was in truth breaking the ten commandments. And, so many people preached if you do not obey God's laws you cannot remain in a saved state. I didn't want to go to hell. But as I believed Jesus only died for my past sins I was heading their fast. And, the more I feared those impure thoughts the worse they got. To use a greek expression, I became full of all manner of concupiscence. The commandments I believed were ordained to life-if I obeyed them, instead brought death/condemnation, for I could not keep them. I ended up utterly sinfull. Looking back, I had felt alive, a normal healthy kid before I made that commitment to God, but not afterwards, for through my knowledge of God's laws, and my belief they must be obeyed to remain in a saved state I believed I was condemned due to my inability to obey them(Rom7:7-11 KJV)