What two natures are at war in every believer?
Every believer experiences a constant warfare between two natures: the new nature, which is driven by the Holy Spirit, and the old nature, which still has its roots in the Satanic powers of the curse. These two natures stand in total opposition and are in continual conflict.
Les explains that for every believer there is a constant warfare between the two natures: the new nature which is Holy Spirit driven, and the old nature which still has its roots in the Satanic powers of the curse. He notes this same opposition exists between the believer community and the world, as two total opposites. In Galatians, Paul warns that the persuasion to go back under legalism did not come from the Holy Spirit who brought them out of paganism, but from the same evil spirit that held them in paganism until the Gospel freed them. Satan never gives up and will even use good things to keep people from the truth, so the spirit taking them into a false gospel is not the same Spirit that brought them out.