[Oyk]

You put that more succinctly - we're to surpass the pharisees in righteousness and not to be like them with a holier-than-thou attitude. Two verses in the Bible succinctly state what must happen in order for believers to live righteously in Christ. "The reason the Son of God appeared was to destroy the devil's work. No one who is born of God will continue to sin, because God's seed remain in him." (1John 3:8,9)

For born-again Christian believers, these conditions have already been met. God has made them partakers in His divine nature. (2 Peter 1:4) and provided the means by which they can live in victory over sin and Satan. Before Christ, they were dead in their sins, but a change took place at salvation. We're no longer "in the flesh" but in Christ. Paul wrote, "Those in the flesh cannot please God." (Rom 8:8) (2 Cor 5:17)

I feel that our goal in religion discussion is not to win arguments but to fight to uphold our crucial doctrine of the gospel truth and also to point others toward Christ as the only means of eternal salvation. If we surrender or remain silence, people may be deceived by Satan who's determined to lead as many people as possible off the spiritual cliff to eternal death.

The apostle Peter challenged every believer to be at the ready to give an answer to anyone who asks them to give an account for the hope that's in them. (1 Pet 3:15) Both of you are clearly equipped to fight like "foot soldiers" with unwavering resolve, by painstakingly gleaning the data from various sources and armed with the truth of God's inspired Word as you use argumentation to convince your interlocutors without sounding hateful. Keep up the good work!

As to the words in bold in your first para, some peepur may wonder why Christians still sin when you wrote that no one who's born of God will continue to sin 

They don't understand that there's a new man in us that's in Christ and without the Sin DNA. Without that sin nature, the new man will not sin. The one who continues to sin is the old man.