Psychiatry and Possession

Is it possible to be a sophisticated psychiatrist and believe that evil spirits are, however seldom, assailing humans? Most of my scientific colleagues and friends say no, because of their frequent contact with patients who are deluded about demons, their general skepticism of the supernatural, and their commitment to employ only standard, peer-reviewed treatments that do not potentially mislead (a definite risk) or harm vulnerable patients. But careful observation of the evidence presented to me in my career has led me to believe that certain extremely uncommon cases can be explained no other way.

'Pope Francis effect' leads to exorcism boom

"Some people are mentally ill and do not need exorcism. But others do and there are some classic signs – people who speak in ancient tongues, for instance. Other people have supernatural strength when they are in a state of possession – it might take four men to hold down a slightly-built woman. In some cases, people are able to levitate."