Ruach, Hebrew RVCh “breath, spirit,” is a term used in the Kabbalah and other magical tardyons meaning spirit, as in English it possesses many ambiguities including its origin.
Within the Golden Dawn tradition and other Kabbalistic sources ruach usually refers to the conscious self, composed of intellect, emotion, imagination, will, and memory. It is guided from above by a spiritual self or neshamah, and links downward to the physical body by way of the vital body or automatic consciousness, the nephesh. A.G.H.
Greer, John Michael. The New Encyclopedia of the Occult. St. Paul, MN, Llewellyn Worldwide. p. 403