There's a lot of misunderstanding of scripture because of misunderstanding what is "sin".
"Sin" is not bad behavior.
Instead, we find sin is defined in scripture as:
Transgression of the law, 1John 3:4.
Unrighteousness, 1John 5:17.
Unbelief, John 16:9.
In the examples of sin above we see that Christians do not sin.
We're not under the law (Rom 8:2, Rom 10:4, Gal 5:18, Gal 3:25, 1Tim 1:9), hence we cannot be charged with it's transgression.
Our faith is counted for righteousness (Rom 4:5) so we cannot be charged with this sin.
We believe in Jesus, hence we cannot be charged with this sin.
So we find that Christians cannot be charged with sin.
Rom 8:33
Who shall lay any thing (even sin) to the charge of God elect? It is God that justifieth.
Christians have "ceased from sin", 1Pet 4:1, "cannot sin", 1John 3:9, as soon as they receive Jesus.
Now as for that imperfect physical part of us, it's already dead (by faith) because of sin.
Rom 8:10
if Christ be in you, the body is dead because of sin.
Hence our imperfect physical lifestyle is not how we are judged whether we are righteous or not.
And nobody is going to profit by doing wrong.
Fortunately our behavior is not what determines if we're righteous, because if it was then nobody would be saved.
Instead our faith is counted for righteousness, Rom 4:5.
I applaud your effort there haz . I mean no insult to you for I used to reason on this just as you, but permit me please to explain the parts I now cannot agree with.
(1) The root of the meaning of sin is in that it means to fall short of God's righteousness which is what all men lacked since Adam's sin. The original Hebrew word for sin merely meant "to miss the mark". It was used also in races to denote falling short of the finish line or goal. And it was used in connection to God to denote falling short of God's commandments. God's commandments speak God's righteousness. They are in fact his righteousness rolled up in words. That is why we need the righteousness of Jesus Christ to show us the way. Jesus is the way and the truth and the life. As the way, the footsteps of Jesus are that narrow road we all must walk to obtain salvation. And, if we are sincere in caring to give our all to do that, then God is faithful to get us there. In that case, we know we will not fail because God cannot fail so long as we are being obedient to do as he instructs us.
(2) For the sake of space here I will only comment for now on Romans 8:33 to show you how you have misunderstood it.
Romans 8:33 "Who shall lay anything to the charge of God's elect? It is God that justifieth;
34 who is he that condemneth? It is Christ Jesus that died, yea rather, that was raised from the dead, who is at the right hand of God, who also maketh intercession for us.
35 Who shall separate us from the love of Christ? shall tribulation, or anguish, or persecution, or famine, or nakedness, or peril, or sword?"
You must keep that in the context that Paul is there speaking of those whom he said were of this group, Romans 8:14 "For as many as are led by the Spirit of God, these are sons of God."
So assuming you do continuously walk by the spirit of God which then proves that you have the spirit of the love that is in Christ also in you, (for that love for his Father can do nothing but follow after the Father), then, and only then it is that God has justified you and no man can condemn you.
The love of the Father (which the Son perfectly shares as one with the Father) is great enough to absorb some unintentional faltering from God's ways, as we see there at Romans 8: 34, 35. In the Psalms, David refers to these types of falterings as "secret sins" (secret to our own selves until God shows them to us) which God is helping us to see. Psalms 90:8 "Thou hast set our inquities before thee, Our secret sins in the light of thy countenance."
But there is another kind of sin which is able to harm our relationship with God and land us up into disaster which we might not recover from. These sins, David called "presumptuous sins". Psalms 19:13 "Keep back thy servant also from presumptuous sins; Let them not have dominion over me: Then shall I be upright, And I shall be clear from great transgression."
But how does God keep us from those serious sins? How does God do what David asked there at Psalms 19:13?
David tells us if we search for it in the Psalms. It would be a presumptuous sin for us to just assume that God does that for us and not look to see how David tells us God does it.
Psalms 119:9 "Wherewith shall a young man cleanse his way? By taking heed thereto according to thy word.
10 With my whole heart have I sought thee: Oh let me not wander from thy commandments.
11 Thy word have I laid up in my heart, That I might not sin against thee.
12 Blessed art thou, O Jehovah: Teach me thy statutes." (ASV)