"The magician's most important invocation is that of his Genius, Daemon, True Will, or Augoeides" writes Peter Carroll in Liber Null. "This operation is traditionally known as attaining the Knowledge and Conversation of the Holy Guardian Angel. It is sometimes known as the Magnum Opus or Great Work."

Angel Millar (author; mentor and consulting hypnotist for self-development):

The Spiritual Survival: