This symbol, often confused with the Caduceus wand of Hermes, is the true symbol of the medical profession. It dates to antiquity, and was a symbol of the Greek God of healing, Asclepius. The symbol of a serpent entwined staff also appears in the biblical book of Exodus, wherein Moses is instructed to erect a brass pole with a serpent; whoever looked upon it was healed.

Related Resources:

• 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.
• 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.
• Hermetic Tradition
  Named after Hermes Trismigestus (Hermes the three times great), the Greek moniker of the Egyptian God Tehuti (Thoth), alleged author of hundreds of mystical tractates, the Hermetic tradition is an eclectic spiritual tradition that encompasses elements from from many religions.