 The main task of the religion was "chunggwang" ("lighting anew"), meaning reviving the memory of Dangun.A particularly controversial issue concerns the roots in Daejongism of the global physical exercise and spirituality system known as Body & Brain, Dahnhak, or Dahn Yoga, founded by Korean master of martial arts and author Ilchi Lee.While "Body and Brain" does not normally emphasize its connection with Daejongism, scholars see it as one of many schools teaching a form of internal alchemy based on the techniques Daejongism popularized.