We will not sin if we walk in love, but this very thing we find so hard to do. If in the teaching the failure and causes of failure are never discussed or even admitted, not surprisingly people go astray, and loose the essence of righteousness, even dwelling in the vine, because now there is no difference between sinner and saint.
Paul had a simple solution:
For sin shall not be you master for you are not under law but under grace rom6:14
I agree with Joseph prince. Most who go to church see little victory over sin in their life because they insist on living under law not grace
If we accept what Paul states the chief cause/ reason of failure is living under law- not grace