Guardian of the Threshold

In Theosophy the Guardian of the Threshold (or Dweller on the Threshold) is a menacing figure described by a number of esoteric teachers. It is claimed to be a spectral image which manifests itself as soon as "the student of the spirit ascends upon the path into the higher worlds of knowledge". The Guardian of the Threshold is also the title of the third play (of a tetralogy of Mystery Dramas) written by Rudolf Steiner in 1912.