As David says in this video, the notion that non-physical entities can exist and interfere with someone is widely dismissed, when it’s been widely accepted and discussed, with common descriptions, throughout diverse paths of human history. Moreover, it’s not hard to understand when you accept that the physical form is not this solid expression most of us take it to be. A brief consideration of the nature of the atom and the existence of the Heisenberg Uncertainty Principle, which says both momentum and position of an electron or other sub-atomic particle cannot be concurrently measured, will tell you that what we take to be solid is mostly empty space.
However, despite the disregard by the general populace and, of course, the supporters of the scientific worldview for such notions as possession, many who work with alternative healing modalities deal with this reality every day, and I count myself amongst them. I commend David’s brief video to you.