Thelema is a mystical/magical philosophy of life based on Will. The individual Will in Thelema is identified with the Egyptian god Had or Hadit, a form of Horus. The Pleroma of infinite potentiality through which Had wends its Way is called Nu or Nuit, the Egyptian goddess of Infinite Space.
Many adherents of Thelema are syncretic and recognize correlations between Thelemic and other systems of spiritual thought; most borrow freely from other traditions. For example, Nu and Had are thought to correspond with the Tao and Teh of Taoism, Shakti and Shiva of the Hindu Tantras, Shunyata and Bodhicitta of Buddhism, Ain Soph and Kether in the Qabalah. Followers of the philosophy of Thelema make free use of the methods and practices derived from other traditions, including Alchemy, Astrology, Qabalah, Tantra, Tarot, and Yoga, regarding them all as being subsumed in the Law of Thelema.
Books You Might Enjoy:
Samuel Liddell Macgregor Mathers - The Tarot
Franz Hartmann - Paracelsus And The Substance Of His Teachings
Helena Petrovna Blavatsky - The Key To Theosophy