Is the "I" in Romans 7 a believer or an unbeliever?
The 'I' in Romans 7 refers to a believer, not an unbeliever. Paul explains from the believer's point of view, acknowledging that even believers wrestle with the old Adamic nature, which has been crucified and defeated but still influences experience. The passage describes two natures within a believer.
Les explains that Paul is writing from the believer's point of view. The believer still has to wrestle against the influence of the old Adamic nature, even though God has reckoned it crucified and declared it dead. In experience, that old nature is still with us, but it is defeated and placed under subjection to the new nature that comes by the power of God. This is where all believers find themselves, as Paul describes in Romans 7:15, and Les points to Galatians 5:16-17 for further clarification about the two natures.