He was also a mystic and heavily into Hinduism which may have formed his opinion.
I did start reading another book about him that featured some Indian swami saying that he was revered in India. They likened him to one of the ancient gods when he was showing off the device where he electricity flowing through him. In the book he wrote he didn't mention it as far as I can remember but he did mention how silly things like esp and other psychic phenomena were.