When Aleister Crowley was initiated into the Hermetic Order of the Golden Dawn, he was initially impressed with the intensity and seriousness of the vows he took never to reveal any of the secrets of the Order. He quickly became disappointed, though, when those "secrets" were revealed to be relatively mundane—or at least well known—things like the Hebrew alphabet and the signs of astrology.
Aleister Crowley Giving the "Sign of Pan"
The title of the book next to him, Perdurabo Magister, means "Master Perdurabo"
Perdurabo, "I shall endure to the end," is the magickal name Crowley took in 1898
when he was initiated into the Golden Dawn
It's true that the Hebrew alphabet and basic