But you are essentially saying we can live in sin, because of your understanding of the NIV scripture there, even though the scripture I quoted made it clear as night and day we cannot do that?
Rather than forcing you to infer what I was saying, let me just say it: I believe we live in sinful flesh and "fleshly desires" or "desires of the flesh" are often, if not usually, at odds with the spirit. Just as Jesus is fully God and fully man, Christians are fully spirit and fully man. That is why the bible speaks of the natural man and the spiritual man. And what Paul is talking about in Romans 7:15 and on.
Only Christ was perfect. A Christian shows evidence of a changed life, but not a perfect life. If I am perfect, I have no need of Christ. And if paul was perfect, he would not have written what he did in Romans (referenced above).