The most advanced shamanic techniques —such as Tibetan Tantra or Crowley’s system in the West— work by alternating faith and skepticism until you get beyond the ordinary limits of both. With such systems, one learns how arbitrary are the reality-maps that can be coded into laryngeal grunts by hominids or visualized by a mammalian nervous system. We can’t even visualize the size of the local galaxy except in special High states.