Overestimated power of the Evil Spirit

I once asked Insoo Kim Berg the following question: "Using exceptions is an interesting part of the solution focus. Have you ever found yourself not able to help the client find relevant exceptions to a problem?"

She gave this interesting answer: "Oh yes. It happens quite often. For instance, I was talking to this lady and she was with a Church that required her to pray all of the time. Now, she was convinced that an Evil Spirit got into her body. And when she said: 'Sometimes I can get up and cook' I thought: 'aha, there is an exception!' But she blocked it right off: 'Oh no, yesterday I couldn't cook'. And then she said things like: 'Sometimes I go out in the woods', or: 'I joined the health club'. And when I tried to talk about these exceptions, she would not talk about it, she kept on blocking me off. What did turn out to work well was that I said: 'You must have been overestimating the power of the Evil Spirit'. She asked why. I explained: 'He has been trying to get you down for many years now and he still has not succeeded.' That helped her see things differently. And then I suggested an exercise with throwing a coin every day. If one side came up she would have to completely ignore the Evil Spirit, never mind what he said. If the other side came up, she should do what she normally did. And in the following sessions she never talked about the evil spirit anymore! In the first session that followed, she mentioned that she was moving to another apartment. And in the next session, which turned out to be the last, she mentioned that she had a boyfriend."