As a psychiatrist, I diagnose mental illness. Also, I help spot demonic possession.

In the late 1980s, I was introduced to a self-styled Satanic high priestess. She called herself a witch and dressed the part, with flowing dark clothes and black eye shadow around to her temples. In our many discussions, she acknowledged worshipping Satan as his “queen.”

I’m a man of science and a lover of history; after studying the classics at Princeton, I trained in psychiatry at Yale and in psychoanalysis at Columbia. That background is why a Catholic priest had asked my professional opinion, which I offered pro bono, about whether this woman was suffering from a mental disorder. This was at the height of the national panic about Satanism. (In a case that helped induce the hysteria, Virginia McMartin and others had recently been charged with alleged Satanic ritual abuse at a Los Angeles preschool; the charges were later dropped.) So I was inclined to skepticism. But my subject’s behavior exceeded what I could explain with my training. She could tell some people their secret weaknesses, such as undue pride. She knew how individuals she’d never known had died, including my mother and her fatal case of ovarian cancer. Six people later vouched to me that, during her exorcisms, they heard her speaking multiple languages, including Latin, completely unfamiliar to her outside of her trances. This was not psychosis; it was what I can only describe as paranormal ability. I concluded that she was possessed. Much later, she permitted me to tell her story.
The priest who had asked for my opinion of this bizarre case was the most experienced exorcist in the country at the time, an erudite and sensible man. I had told him that, even as a practicing Catholic, I wasn’t likely to go in for a lot of hocus-pocus. “Well,” he replied, “unless we thought you were not easily fooled, we would hardly have wanted you to assist us.”
So began an unlikely partnership. For the past two-and-a-half decades and over several hundred consultations, I’ve helped clergy from multiple denominations and faiths to filter episodes of mental illness — which represent the overwhelming majority of cases — from, literally, the devil’s work. It’s an unlikely role for an academic physician, but I don’t see these two aspects of my career in conflict. The same habits that shape what I do as a professor and psychiatrist — open-mindedness, respect for evidence and compassion for suffering people — led me to aid in the work of discerning attacks by what I believe are evil spirits and, just as critically, differentiating these extremely rare events from medical conditions.

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.
https://www.washingtonpost.com/posteverything/wp/2016/07/01/as-a-psychi…