God counts sin, as a vehicle to separate him from his creation. This is directly tied to the Garden and in Romans 6:6 is states that the body of sin, which is our nature as humus, meaning humanity born of Adam, is accounted the original sin in the garden.
So, the sin or not to sin question, is really how we are considered by God, not from a sinless nature, but from the Mosaic blood on the door imputation of the curse of death passing our doors (person). So long as the conditional statement IF......THEN is met as far as staying in the Lamb of God, the curse of death, that is spiritual death, the separation from God is no longer being applied to us by God.
There are three parties in this transaction, the Father, the Son and the Holy Spirit indwelled believer. So we can never claim to be sinless, so long as the IF.....THEN conditional statement applies.
However Paul and the Hebrews writer tell it that we will have that nature, after the body of sin is finally biological laid to rest and the New eternal body is granted by the almighty judge for those individuals who have stayed their course and have kept the faith onto biological death.
26The last enemy to be destroyed is death.
27For he “has put everything under his feet.”
c Now when it says that “everything” has been put under him, it is clear that this does not include God himself, who put everything under Christ.
28When he has done this, then the Son himself will be made subject to him who put everything under him, so that
God may be all in all. (1 Corinthians 15)
The phrase that God will be all in all is saying that we will have the image of the Heavenly by nature, after we are raised in the incorruptible state, post biological death, at resurrection day. It doesn't mean that we will be like God, oh no, it means that we will then have God's sinless nature as his Sons.
So Christ was once offered to bear the sins of many; and unto them that look for him shall
he appear the second time without sin unto salvation. (Hewbrews 9:28)
The Hebrews writer after saying all men are destined to biologically die once then Judgement, places this without sin or sinless nature state only after we put on the glorified form at resurrection.
In this life, we are still in the spiritual womb and are yet to shed our blood, as far as the Testator needing to die, before the sinless nature can take effect and the eternal inheritance that was hoped for and not yet seen/received to be finally realised in the eternal life to come.
No one can claim a sinless nature, whilst they are tempted daily to the body of sin, the very nature that is tied to the fall, which separated man from God, until the Messiah came to impute his righteous blood on us.
