In a book called The Mystery of the Golden Blossom by Samael Aun Weor, there is a chapter dedicated to astral projection. Samael writes how he went to the astral plane and has contacted the spirit of Eliphas Levi, asking him for the key to astral projection that he could then deliver to humanity. Eliphas agreed, but before giving him the key, he told him to first bring him the answer regarding what is the most monstrous thing that exist on earth. Samael pondered and pondered over it, and Read more