Romans 7:17-20

And now I realize that it is no longer my true self doing it, but the unwelcome intruder of sin in my humanity. For I know that nothing good lives within the flesh of my fallen humanity. The longings to do what is right are within me, but willpower is not enough to accomplish it. My lofty desires to do what is good are dashed when I do the things I want to avoid. So if my behavior contradicts my desires to do good, I must conclude that it’s not my true identity doing it, but the unwelcome intruder of sin hindering me from being who I really am.