If one were to seek a reliable witness, it is Crowley and his LAM to which one should turn.
Despite many biographers and Christian groups taking Crowley's Great Beast pronouncements at more than face value, as a scribe and describer of what he witnessed Crowley is admirably on his guard against deception by the entities he encountered.
What this means for the mythology and government coverups of "UFOs" is not difficult to deduce...