In the Cabala, from God, when there was nothing, came the emantation of light from which there were ten emantations, the Sephiroth ('numbers' or 'catagories'). These lights of the Ssephiroth constitute the sacred name of God. They are also a path by which man can reach god. Connecting the ten Sephiroth are twenty-two paths, corresponding to the greater arcana of the tarot. The realmos of the Sephiroth-which are divided into four worlds corresponding to the traingles (Atziluth, Briah, Yetzirah, Assiah)--can be explored intellectaully or through mystical disciplines.
("The Horror at Red Hook")