This is a brilliant interview by Robert Stanley with a highly experienced PhD psychiatrist, who finally began to treat people, with an understanding that the voices they heard in their head were real. You will be stunned by this information and have a more pluralistic view of demons and mental illness. One that is less about drugging people till the voices go away, or become tolerable, but actually about treating the issue as real.
This subject is something modern psychiatry totally loses the plot about. An irony considering that logically its a mental illness to ignore reality.