Aiwaz wird im Liber AL vel Legis einmal erwähnt. „Behold! it is revealed by Aiwass the minister[sic] of Hoor-paar-kraat.” „Siehe! Es ist offenbart durch Aiwass den Gesandten von Hoor-paar-kraat.“  Aiwaz, so verstand es Crowley, war der Vermittler zwischen Harpokrates und ihm selbst. Die Form die Aiwaz annahm war die Erscheinung von Ra-Hoor-Khuit, die aktive und verkündende Form von Harporkrates. Letzterer stellt in Crowleys Mystik den schweigenden und passiven Aspekt von Horus dar. Crowley schrieb, dass Aiwaz in einer Art Wolke schwebte und „ein großer dunkler Mann in den dreissigern schien, wohlgebaut, stark und lebhaft, mit dem Gesicht eines grausamen Herrschers und verschleierten Augen, damit ihr Strahl nicht zerstöre, worauf er senen Blick richtete“. Seine Stimme beschrieb Crowley als „eine tiefe Stimme, melodisch und ausdrucksvoll, feierlich, sinnlich, zärtlich oder zornig, wie immer es dem Inhalt [des Liber AL vel Legis] entsprach“.[2
Durch Kenneth Grant, einen Schüler Crowleys in den Jahren vor Crowleys Tod, entstand um Aiwass ein eigenwilliger Mythos, bei dem Aiwass mit einem von Crowley gemalten Wesen identifiziert wird. Dieses Bild zeigt ein Porträt von einem menschenähnlichen Wesen mit sehr großem Hinterkopf und mandelförmigen Augen, nicht unähnlich den modernen Darstellungen von „Außerirdischen“. Crowley nannte das dargestellte Wesen „Lam“. Als Kenneth Grant dieses Bild für sich auswählte, soll Crowley „Aiwass“ gemurmelt haben, was von Grant so verstanden wurde, daß Aiwass und Lam zumindest in enger Beziehung zueinander stünden. In Folge dessen entstand ein wenig verbreiteter „Lam-Kult“ als Unterströmung der thelemischen Bewegung.
Vowels in many ancient languages were considered to be sacred, their use restricted to construction of the sacred, secret name of the highest deity. Within such a secret spelling would be incorporated important religious & magickal truths. Thus the sacred knowledge would be preserved__yet remain hidden.
In ancient Hebrew, in Egyptian, and in others, vowels were entirely omitted from the written language to avoid their profanation: e.g. in the spelling of the sacred name I H V H, which we often transliterate as "Jehovah", adding in the omitted vowels.
With no written records, the true pronunciations of sacred words of power were able to be kept highly secret, for whoever knew the correct pronunciation of the name of another's god prevailed. Note that the use of dots beneath the consonants to indicate vowel inflections is a relatively recent convention.
This bears upon the spelling of the name Aiwass, the name given as his own by the praeter-human Intelligence who channeled the text of Liber AL through Aleister Crowley. There are many diverse spellings and numerations of this name based on Qabalah, both in Hebrew and in Greek. Among them are Aivas ~ 78; Aiwaz ~93; and Aifacc ~ 418; as well as Aiwass, which we will discuss.
If we "paste the sheets from right to left" in the construction of a qabalistic spelling of this sacred name, we move sunwise from right to left as we do when facing north, and as both ancient Hebrew, and often Egyptian scripts were written.
Proceeding sunwise through the vowels as they preside over their stations of the year, we begin with O of growth and re-birth, represented by the Spring Equinox, and the beginning of the Sacred Year, the psychic year, and the beginning of the year in the New-Aeonic calendar.
Next is the letter U of culmination at the Summer Solstice; then the vowel-station of Autumnal Equinox, the letter E of balance, and of shifting focus. With Eve of the Winter Solstice we are brought the letter I of death, and finally, the Winter Solstice itself gives us the birth-letter of the first day of the new year, the letter A.
At the East of the name Aiwass we have the letter S of the solar Hawk, symbolic of the child Horus of whom Aiwass said himself to be the messenger or Angel. The S-month directly follows the anniversary of the channeling of Liber AL in early April; while S by E.Q. corresponds to the sixteenth path of the Tree of Life, and to The Hierophant, Atu V of the Tarot, who is the Initiator of the present Aeon.
Atu XVI, The Tower, is also known as War. Crowley notes that it "seems to indicate the quintessential quality of the Lord of the Aeon" as described in Liber AL, III. 3-9; 11-13; 17-18; 23-29; 46; 49-60; 70-72, and that "it [Atu XVI] may be taken as a preface to Atu XX, The Last Judgment, i.e., the Coming of a New Aeon."
Atu XX, The Aeon, has further been described by Crowley as "the message of that angel who brought news of the New Aeon to earth." Shin, the corresponding Hebrew letter transliterates as S in English. Thus S as signature-letter denotes the identity of the Logos of the Aeon, the Angel Ra-Hoor-Khu.
It has been said by Crowley and by others that the central truth humanity will come to understand in the New Aeon is that just as the sun does not die each evening to be re-born again each day at dawn, so too physical death does not end the cycle of our lives. For death and birth are simply opposing curves in a recurrent cycle, twin curves of the snake of Life.
Thus using our seasonal vowel-sequence, beginning with S as the signature-letter of the speaker, we have the spelling AIEUOS. Reading AIEUOS sunwise: Our lives begin at the O of rebirth, or Initiation by The Hierophant, the letter S. We then proceed to the culmination of our powers signified by the letter U. Then, our powers decline, signified by the letter E, and finally we move through to death, the letter I. But death no longer ends the cycle of our lives, for we end instead with the letter A, of birth and of beginnings. The cycle ~ encompassing both death and life ~ begins and ends with birth.
Giving each letter its E.q. value, AIEUOS adds to 31 ~ the number discovered by Charles Stansfeld Jones to be the "key of it all", the key to Liber AL, and the number of "unity", "god", "not". The thirty-first path of the Tree of Life is that of The Aeon, Atu XX, the glyph of the Angel of Ra-Hoor-Khu as discussed above, and the essence of the Spirit of the Aeon. Thus AIEUOS may be identified not only as a praeter-human intelligence, or simply as Crowley's own Holy Guardian Angel, but as the universal embodiment of the Spirit of the Aeon, and emanator of the 93-Current expressed in Liber AL.
Placing each letter of the name within the Sephira associated with its number reveals the operation of the formula of N.O.X. ~ E unites with I producing O and U, which in their union again become E and I ~ A is the summit, the final dissolution into the Unity which is Nought.