I think that even if we have stopped sinning we can never be sure that we have and will always wonder and be tempted to doubt.
Jesus stops us being able to justify our distance from God by our sinfulness. He has essentially made sin not the issue - although we still like to use it as the self-pitying excuse why we cannot possibly approach closer to God today. (Take up thy bed and walk he says.)
Paul talks somewhere about how creation groans as it gives birth. The Spiritual life is essentially a creative one and the Christian life lived fully is surely an act of giving where no giving was before (which is what creating surely is - with prayer at its hub). I'm enough of a musician to see a link for me here with the artist as he fights with himself to create his work.(Something out of nothing.)
One of my worst problems as a younger man was my misunderstanding about who or what the enemy was. For many years I didn't want to conceive that there was an enemy. I wanted a tidy philosophy and I couldn't understand why God created a world with a devil in it. It was through the psalms that I came to understand how essential it was to recognise my enemy. It is through one psalm particularly that I was able to begin to walk in a more spiritual way: Psalm 3 (or 4 depending on numbering). This is the psalm that St Benedict tells his monks to say at the beginning of every single day and I cannot overstate what a source of joy and grace this has been for me . . . .
How many our my foes O Lord;
How many are rising up against me;
How many are saying about me:
there is no help for him in God!
But You Lord are a shield about me:
my glory who lift up my head.
I cry aloud to God
And He answers from His holy mountain . . . .

first it reminds me of the enemy - deep within my own self of course -
whispering it's doubt and how many other things I should be worrying about etc etc and then it turns me straight to God . . . . it helps me refocus my entire life over and over again.