Mysticism is dangerous. But first, you ask, what is mysticism? There are lots of definitions. My personal favorite, by the 20-Century British writer on the subject Evelyn Underhill, is “mysticism is first-person religion.” To paraphrase the rationalist Thomas Paine, Revelation is only for the person who received it. For everyone else it is mere hearsay. Yet at least the three Abrahamic religions are based on revelations to others. We “believers” are simply takingtheirexperiences on faith. Our religions are thus third-person affairs.