"Top soul, and the first to leave at the moment of death, is Ren, the Secret Name. This corresponds to my Director. He directs the film of your life from conception to death. The Secret Name is the title of your film. When you die, that's where Ren came in.
Second soul, and second one off the sinking ship, is Sekem: Energy, Power, Light. The Director gives the orders, Sekem presses the right buttons.
Number three is Khu, the Guardian Angel. He, she, or it is third man out ... depicted as flying away across a full moon, a bird with luminous wings and head of light. Sort of thing you might see on a screen in an Indian restaurant in Panama. The Khu is responsible for the subject and can be injured in his defense-but not permanently, since the first three souls are eternal. They go back to Heaven for another vessel. The four remaining souls must take their chances with the subject in the Land of the Dead.
Number four is Ba, the Heart, often treacherous. This is a hawk's body with your face on it, shrunk down to the size of a fist. Many a hero has been brought down, like Samson, by a perfidious Ba.
Number five is Ka, the Double, most closely associated with the subject. The Ka, which usually reaches adolescence at the time of bodily death, is the only reliable guide through the Land of the Dead to the Western Lands.
Number six is Khaibit, the Shadow, Memory, your whole past conditioning from this and other lives.
Number seven is Sekhu, the Remains."
Throughout, Ancient Evenings changes perspective from one soul to another. While it sets a unique and unpretentiously surreal atmosphere for the book, it can be discouraging from the start if you don't know the method to the madness. (I suggest printing these Burroughs definitions and using them as a handy bookmark and reference.)
Also, Julian Jaynes' Bicameral Mind Theory seems to have worked it's way into the psyche of Mailer's subjects. A superficial understanding of his theory, I think, will help you to have a deeper and more enlightening understanding of these seemingly strange characters. Simply put, Jaynes' postulated, and vehemently defended, the idea that ancient mankind did not live in the conscious state that we do, but in a halucinatory state in which a person didn't pause to think through a decision when met with an obsticle. Rather, the descision was made almost instantly on a subconscious level, in a part of the brain that functions, and serves the same purpose, in the conscious mind today. The decision was then presented to this ancient human being in the form of an halucinated, auditory command. As life became more complex for ancient man, the Bicameral Mind became less effective and began to break down. This breakdown, according to Jaynes, is the evolutionary source of all religion in modern mankind. He references the world of Homer and the Iliad, and the strange worlds of the ancient Egyptians and pre-Columbian Aztecs as shinning examples of societies that functioned under the bicameral mindset. Mailer was very much under the spell of Julian Jaynes and his ideas, as were many authors and intellectuals in the late 70's and early 80's.