Rom 7 is about the war, in which he says oh wretched man that I am. Sounds like sin. Then: But thanks be to God through our Lord Jesus, because 8:1 there is THEREFORE (having been honest about still being in sin) now no condemnation on those who are in Christ Jesus.
Condemnation has to do with justification. It does not mean we have suddenly become perfect in performance but our credit is restored by a third party--Christ!
Go and really learn justification from Luther, Spurgeon or Brinsmead and then we'll chat.
The doctrine of demons is to think that Romans 7 is about an unbeliever.
In my understanding, Romans 7 is dealing with the issue of the certainty that the Believer who attempts to serve in his own strength, is only opening himself up to - the self-comdemnation the resulting failure to serve in his own strength can only result in.
Romans 7:23 But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members. 7:24 O wretched man that I am! who shall deliver me from the body of this death? 7:25 I thank God through Jesus Christ our Lord. So then with the mind I myself serve the law of God; but with the flesh the law of sin.
THAT is the condemnation that Romans 8:1 opens with asserting does not have to be the Believer's reality if he'll but walk in the Spirit, given the fact that the principle of life in the Spirit that the Cross has made possible, is the Believer's for him to mind, access, and or walk in the victory of, by faith.
All that without Luther, Spurgeon, Brimsmead or whomever...
Because all that is what the Scripture is for, 2 Tim. 3:16-17.