Online Reference For Body, Mind & Spirit

Term: Dark Night of the Soul

Term now familiar in Western mystical psychology: 16th-century Spanish Carmelite St. John of the Cross (whose writings reveal much Qabalistic understanding) used it to describe the intense desolation which characterized the eighth of his ten stages of spiritual ascent, corresponding to the experience of Binah, the Third Sephira.
SOURCE:  Planetary Magick, Denning & Phillips, (Llewellyn Publications)