Christians don't dive into sin like they used to before they were born in Christ. Our sensitivity to sin and our convictions of them are a good indicator that Christ is alive in us and at work on us in someway, shape or form.
From this perspective, I can understand what is meant by saying that: Christians don't sin all the time, but do so on occasion because we would not knowingly continue sinning and rebelling against our Lord and Savior.
If that is what you mean by that statement that I am in total agreement.
But what about this perspective:
For all have sinned and fall short of the glory of God....
Because Jesus died for us, we can be declared righteous. God justifies those who have faith in Christ—and therefore no one can brag about how well they keep the law.
If no one can brag about righteousness, how can we say that we are not sinners? If we refrain from sinning all the time, but yet, still sin on occasion would not that act of occasional sin still be viewed as sin regardless, in the eye's of the Lord? Sin that still needs to be repented of?
If we are not sinners then we are not in need of a Savior. If you occasionally sin are you only occasionally in need of a Savior?
Even if we have not committed any sins to the best of our knowledge, is it possible that there are unknown sins we may harbor that have not been brought to light?
If unknown sin is not of any significance why does it have the potential to hinder God's presence in our walk?
The heart is deceitful above all things, and desperately wicked, who can know it?
And Jesus said to him, "Why do you call me good?" No one is good except God alone.
If Jesus did not even consider Himself good, what by our own definition is a good Christian?
Again, I only ask these things because I'm trying to understand your point of view on why Christians are not sinners. If you have knowledge of something that I may not understand because of my lack of spiritual maturity, please forgive me for I am not trying to argue or challenge anything, just trying to learn more from others...