It is an illusion, but at the same time it's not. It's 100% real to the person perceiving the shift, and in the case of treating mental illness that's all that

It is an illusion, but at the same time it's not. It's 100% real to the person perceiving the shift, and in the case of treating mental illness that's all that really counts. It's not so much about how it works or why it works, it's mostly about the result.