The original post brought an interesting point, which was, can we practice sin and then just blame it on our flesh nature and still claim we are saved because of the grace of God? The answer to that is simple, no. Read the book of James, saving faith that is under God's grace hates sin and strives to walk close to God. Now one more point, any person out there who does not believe they have sinned in the last week are fooling themselves. We do not expect to sin, we do not think of sin, however when we are aware that we have sinned we ask for forgiveness in Christ name.