Within the mystical system of the A.A., after the adept has attained the Knowledge and Conversation of his Holy Guardian Angel, he then might reach the next and last great milestone—the crossing of the Abyss, that great spiritual wilderness of nothingness and dissolution. Choronzon is the dweller there, and his job is to trap the traveler in his meaningless world of illusion.
However, Babalon is just on the other side, beckoning. If the adept gives himself totally to her—the symbol of this act being the pouring of the adept’s blood into her graal—he becomes impregnated in her, then to be reborn as a Master of the Temple and a saint that dwells in the City of the Pyramids. From Crowley's book Magick Without Tears:
[S]he guardeth the Abyss. And in her is a perfect purity of that which is above, yet she is sent as the Redeemer to them that are below. For there is no other way into the Supernal mystery but through her and the Beast on which she rideth.
and from The Vision and the Voice (12th Aethyr):
Let him look upon the cup whose blood is mingled therein, for the wine of the cup is the blood of the saints. Glory unto the Scarlet Woman, Babalon the Mother of Abominations, that rideth upon the Beast, for she hath spilt their blood in every corner of the earth and lo! she hath mingled it in the cup of her whoredom.
She is considered to be a sacred whore because she denies no one, and yet she extracts a great price—the very blood of the adept and his ego-identity as an earthly individual. This aspect of Babalon is described further from the 12th Aethyr:
This is the Mystery of Babylon, the Mother of Abominations, and this is the mystery of her adulteries, for she hath yielded up herself to everything that liveth, and hath become a partaker in its mystery. And because she hath made her self the servant of each, therefore is she become the mistress of all. Not as yet canst thou comprehend her glory.
Beautiful art thou, O Babylon, and desirable, for thou hast given thyself to everything that liveth, and thy weakness hath subdued their strength. For in that union thou didst understand. Therefore art thou called Understanding, O Babylon, Lady of the Night!
The concept contained within this aspect of Babalon is that of the mystical ideal, the quest to become one with All through the annihilation of the earthly ego ("For as thy blood is mingled in the cup of BABALON, so is thine heart the universal heart."). The blood spilling into the graal of Babalon is then used by her to "flood the world with Life and Beauty" (meaning to create Masters of the Temple that are "released" back into the world of men), symbolized by the Crimson Rose of 49 Petals.
In sex magic, the mixture of menstrual blood and semen produced in the sexual act with the Scarlet Woman or Babalon is called the Elixir Rubeus (abbreviated as El. Rub. by Crowley in his magical diaries), and is referred to as the "effluvium of Babalon, the Scarlet Woman, which is the menstruum of the lunar current" by Kenneth Grant.
Also try this free pdf e-books:
Marion Crawford - The Witch Of PragueSamuel Croxall - The Secret History Of Pythagoras
Martin Boord - The Cult Of The Deity Vajrakila