"Where does the problem of sin ORIGINATE for a Christian?

Is the Christian life intended to be a continual personal 'struggle' against sin?  Is it possible for a Believer to get to the place of consistent victory over the world, the flesh and the devil? What about the issue of sin and the Christian?  Does a Christian still have a sin nature as well as a new nature?  What does religion say?  What does the Bible say?  What does experience say?  Join me for today's topic.  You will be challenged and you may want to challenge me!  God Bless You with the knowledge of HIM!