Choronzon is a demon or devil that originated in writing with the 16th century occultists Edward Kelley and John Dee within the latter's occult system of Enochian magic. In the 20th century he became an important element within the mystical system of Thelema, founded by Aleister Crowley, where he is the Dweller in the Abyss, believed to be the last great obstacle between the adept and enlightenment. Thelemites believe that if he is met with the proper preparation, then his function is to destroy the ego, which allows the adept to move beyond the Abyss of occult cosmology.
Choronzon according to Crowley
Otherwise known as the Demon of Dispersion, Choronzon is described by Crowley as a temporary personification of the raving and inconsistent forces that occupy the Abyss.
In this system, Choronzon is given form in evocation only in order that it may be mastered.
Choronzon is deemed to be held in check by the power of the Goddess Babalon, inhabitant of Binah, the third Sephirah of the Tree of Life.
Both Choronzon and the Abyss are discussed in Crowley's Confessions (ch. 66):
"The name of the Dweller in the Abyss is Choronzon, but he is not really an individual. The Abyss is empty of being; it is filled with all possible forms, each equally inane, each therefore evil in the only true sense of the word—that is, meaningless but malignant, in so far as it craves to become real. These forms swirl senselessly into haphazard heaps like dust devils, and each such chance aggregation asserts itself to be an individual and shrieks, "I am I!" though aware all the time that its elements have no true bond; so that the slightest disturbance dissipates the delusion just as a horseman, meeting a dust devil, brings it in showers of sand to the earth."
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Taken from Wikipedia online encyclopedia
