Father Seraphim Rose in his book

Seraphim wrote in the mid-1970s about the dangers of neo-pagan cults, there were other worship observers, although they did not sound as much as 1979, when worship terrorism hit America after the Jonestown Massacre. Without the patristic principles of spiritual life, however, these observers could not capture the underlying unity behind UFO, Eastern religions, and charismatic revival - apparently using the techniques of the mentumists to come into contact with the corpses of spirits under different disguises.