Oh really?
"Thanks be to God through Jesus Christ our Lord! So then, I myself serve the law of God with my mind, but with my flesh I serve the law of sin."
The plain sense of the text is Paul is saved but still sins in the flesh. Present tense, not past tense is what we are reading here.
Whatever..keep excusing away your sins with the bible. John lived with Jesus and he said...
9 Whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God
He is correct and I no longer sin, it is not hard.