I'm reminded of that scene from A Beautiful Mind where someone asks him if he still has his hallucinations. He looks over and sees the fake people still there, and says "Oh no, they're not gone. Maybe they'll never be." And they still would drag him into things again, but he has learned to ignore them and not get pulled in.
So it is with internal demons sometimes, I find. You learn to recognize them, rather than expunge them.
Sometimes they help recognize what's important. Upon identifying them, I get angry my brain is talking to me that way, and find the will to get shit done.
It's kind of incredible how the sub-concious finds ways to help you out sometimes. It sucks one needs to first learn how much it likes to use dirty tactics though.
So it is with internal demons sometimes, I find. You learn to recognize them, rather than expunge them.