Known only in restricted circles and closely guarded from unworthy hands, this is one of the most secret books of Kabbalah. It carefully describes the upper worlds in a very ethereal and symbolical language. It uses practical methods and pronunciations of the Divine Names that were employed by the High Priest in the Temple. It describes the names of Angels and Demons, and also explains how to summon them. This text is written for advanced readers who are at the conclusion of their kabbalistic formation.