Do you understand what sanctification is? That is the process whereby after we are saved we grow more and more like Christ Jesus. We will at no point as long as we are in these bodies be sinless. When we are with Christ Jesus in heaven, glorified, then we will be like Him in other words sinless. But as I just said not until then.
I can see you are stating the popular opinion here with regards to man and sin. But is this what scripture is telling us? I doubt. Just for instance
Scripture tells us
---- to be holy and perfect as our Father which is in heaven ( is there sin in holiness or perfection, is there sin in God?);
-----to be Christlike, - to reach the measure of the stature of the standard of Christ,;
-----to walk as Jesus walked here on earth (1John 2:6). For that is the only way we can be holy and perfect. Did Jesus sin while walking on earth? Are we saying that God is deceiving us by telling us to do what he knows we are incapable of doing?
He knows we are capable of doing it by his grace for His grace is sufficient for us as Christ Jesus tells us. (2 Cor. 12:9) His devine power has given us all things that pertain unto life and godliness through the knowledge of him that has called us to glory and virtue ( 2 Peter 1:3) ----- called us not just to glory but to virtue as well.
So, you see, He did not just give us that injunction but he also gave us all the necessary tools and infrastructure we need to comply.. the more reason he gave us his Son to come and give us an understanding that we may know him that is true, and we are in him that is true, even in his Son Jesus Christ. This is the true God and eternal life (2 John 5:20)
On Sanctification, well, I believe as scripture says, that our Salvation is contingent upon washing of regeneration (justification) and renewing of the Holy Spirit (Sanctification). ( Titus 3:5, 2Thessalonians 2:13). I guess our definition of Salvation differs, therefore, our belief on same will equally differ.
Christ Jesus justified us with his blood so that we can have eternal life. ( inherit the kingdom). And to have eternal life we must do good works. Scripture tells us that God judges every man including believers
according to their deeds ( The basis of God;s judgment is works mixed with faith, not faith for faith without good works is no faith. It is possible to say I have faith when no faith exists. And, this is one of the reasons we are tested or tried to prove our faith-- to show us our true heart). Those who obtain eternal life are them who in continuance in well doing seek glory, honor and immortality (Romans 2 :6 -11).
The " totality" of our Salvation ends with eternal life, not justification. Or what is the need of being justified without obtaining eternal life? One might say eternal life is automatic once one is justified, as I see people say, your justification saves you irrespective of what you do. Does the bible tell us so?
In justification we receive the righteousness of God in Christ Jesus. In terms of quality, we have the same righteousness as Christ but in "quantity", it is not so. That is why we are required to grow in righteousness ( in this grace of God) to reach the measure of the stature of the standard of Christ. We grow in righteousness through Sanctification ---work mixed with faith, for faith is the catalyst for our works.
It is possible for a righteous man to sin and God states clearly in Ezekiel 18: 24 that a righteous man who sins will be treated just like a sinner is treated. Therefore, justification does not automatically give us the "totality" of our Salvation. As already mentioned, we are saved not just by Justification but by Justification and Sanctification. This is what gives us eternal life.
Jesus says, in my Fathers house there are many mansions. if it were not so, I would have told you. I go to prepare a place for you. (John 14: 2). And Paul tells us about his visions and revelations in 2 Cor 12: 1 - 5 of a man caught up to the third heaven and another caught up to paradise. And we know where the glory lies even if they are all in heaven. The race is not just to cross the line but to obtain the price. therefore, we must like St Paul, press toward the mark for the price of the high calling of God in Jesus Christ.