In Ritual magick, The Holy Guardian Angel or HGA represents one's higher genius, or divine self. The phrase comes from the fourteenth century grimoire The Sacred Magick of Abramelin the Mage, and is most commonly employed in Thelema, where it is considered the ultimate goal of all operations.

JFC Fuller, Knowledge and Conversation

Related Resources:

• Thelema
• Ritual Magick
  Ritual Magick, also known as Ceremonial Magick, one of the most mysterious and misunderstood spiritual traditions, dates back in various forms to the beginnings of human culture, and has been continually practiced through to the present day- inspiring movements as diverse as Wicca, Theosophy, and the New Age, as well as such diverse disciplines as Chaos magick, Aeonic magick, and Thelema.
• Beginning Magick
  Resources and primers for beginners to Magick.
• Magical texts
  Etexts, Grimoires, tables, and other source material for Ritual Magick. Agrippa, Dee, Crowley, etc. resources and instruction on Tarot, esoteric kabbalah, magickal weapons, more.