The way you read Paul's statements there is no free will for man, he is now under the effects of Christ and has to do nothing. He just goes on his way living for Christ without any problems.
Brother, this is a strange distortion of what I wrote. I realize going deeper into Paul's writing may take you into unfamiliar territory, but don't reject it out-of-hand with these Strawman versions of what he taught (or what I've written). Why did Paul write the sixth chapter of Romans? Well, because the believers at Rome did not understand what Paul explained to them in
Romans 6. If he'd held to the idea that being saved meant one was "now under the effects of Christ and has to do nothing,"
the entire letter to the Romans would have been unnecessary. Obviously, Paul did not think this - and neither do I.
Instead, I explained to you that the Christian has three basic
actions they must take in walking with God:
receiving,
remaining in, and
reflecting the work of God. I also wrote of the need for submission in the believer's walk with God. So, the Christian person isn't utterly passive, "under the effects of Christ without anything to do." I don't understand, then, why you'd mischaracterize my remarks as you have above.
When Paul said, "let not the sin nature reign in your mortal bodies" he meant exactly that. It can reign in you if you let it. It's still present, and will reign as a king if you don't mind the things of God.
Actually, Paul started chapter
6 of
Romans with a rhetorical question that indicated, I think, that he believed there was no good reason why any Christian should be "continuing in sin that grace may abound."
Romans 6:1-2 (ESV)
1 What shall we say then? Are we to continue in sin that grace may abound?
2 By no means! How can we who died to sin still live in it?
I think it's very important to note here that Paul thought the believers at Rome should not have been living in sin, not because they
could have been feeding the right nature and were not, but because
they were living in denial of the truth of their death to sin by their co-crucifixion with Jesus Christ. In more modern, more concise terms, Paul was saying, in the first eleven verses of chapter
6 of
Romans, "Why in the world are you living in sin? You're all dead to sin by your spiritual union with Christ in his death, burial and resurrection. He died; you died. He rose from the dead into newness of life; so did you. Believe it and live in the truth of who you've become in Christ and in the freedom from sin that is your spiritual birthright in him!"
This is a
very different doctrine than the "two dogs" doctrine that has become so common among Christians today. Rather than the Christian being the deciding factor in what is true of their life, Paul taught that the Christian who "feeds the bad dog" is living unnaturally, against their new nature given to them in Christ. The truth is that the "bad dog" is crucified with Christ and held powerless on the cross as a result, without real power to cause any born-again believer to sin. This isn't a fact that the believer makes true by their choice to feed one "dog" or the other, but is the truth already about them into which they need to settle, by faith, and live in, by faith, every day (
Romans 6:11; 2 Corinthians 5:7). As they do, the truth about who they are in Jesus begins to be reflected in their daily living.
Walking by faith this way, coupled to constant submission to God's will and way, are the two "keys" Paul offers to the born-again believer in
Romans 6 by which they may escape any and all sin.
Romans 6:11 (ESV)
11 So you also must consider yourselves dead to sin and alive to God in Christ Jesus.
Romans 6:13 (ESV)
13 Do not present your members to sin as instruments for unrighteousness, but present yourselves to God as those who have been brought from death to life, and your members to God as instruments for righteousness.
It isn't on us to make the "good dog" strong and well-fed and to starve the "bad dog," but, from a position of submission to God, to live by faith in the truth of what God has
already done in, and for us, through Christ. It is by this means that the Christian person "lets not sin reign in their mortal body."