"IF the Christian cannot be able to sin , even persisitant for a time, WHY all of admonisitions in scripture to abide in Christ, walk in the Spirit, restore one who is sinning back to the Lord, etc?"
Those passages you are referring to are not speaking about a Christian who is living in sin or even could do so. They are calling us to, this is going to be difficult, NO SIN.
The Spirit never convicts to do our best and just ask forgiveness, He calls us to perfection even as our Lord and allows forgiveness when we fail, but the call is to live without sin. Can anyone do it. Yes I believe we all can otherwise there is no need to convict every time we sin, other wise just let us confess and go on.
However here is a way to tell what is in our hearts. The bible teaches that our hearts are wicked and we cannot even know our own hearts. I know that is true because of the times I have done things and then wonder how I could have done such a thing. My heart told me I was better then I was. It lied to me. So if we look at what we do on a daily bases we can see the truth about our hearts. we can see just how much or how little we really love the Lord by looking at our own walk.
I understand what you are saying above as that is standard teaching in the church today, but it is not biblical since it simply does not agree with scripture. 1John 3:9. No one who is born of God practices sin abd that includes for a short time as that would still be practicing sin. The passage is not a time passage. it is a character passage because of who lives in us. So no, a real Christian cannot backslide as the term is taught today.
lets make this biblical and simple!
We as Christians still have old sin principle/nature within us, will be there until death/Rapture/Second Comg
We struggle against obeying God, as flesh fights Him, we need to exercise renewing minds by Bible, and walking in HS, abiding in Christ, as long as we keep doing that, God will enable us not to sin..
WHEN we fall back though, and at times ALL do in the Lord, God will faithfully forgive and cleanse us from ALL sin commited, IF we confess them to Him...
On the poll, the 2 options of "never backsliding" and "have never" are both sins of lying!
See how simple this is, all from the Bible!
What you seem to hold to is a form of Weseyln 'sinless perfection" that holds that it is indeed possible to reach a state of non sinning in this life thru a "scond act of Grace"
Only problem is that it is NOT scriptually!