“…he who would fathom the depths of philosophic thought must familiarize himself with the teachings of those initiated priests designated as the first custodians of divine revelation. The Mysteries claimed to be the guardians of a transcendental knowledge so profound as to be incomprehensible save to the most exalted intellect and so potent as to be revealed with safety only to those in whom personal ambition was dead and who had consecrated their lives to the unselfish service of humanity. Both the dignity of these sacred institutions and the validity of their claim to possession of Universal Wisdom are attested by the most illustrious philosophers of antiquity, who were themselves initiated into the profundities of the secret doctrine and who bore witness to its efficacy.”

– Manly P. Hall: The Secret Teachings of All Ages