“Porphyry, whose works – to borrow the expression of an irritated phenomenalist – “are mouldering like every other antiquated trash in the closets of oblivion”, speaks thus of these Diakka – if such be their name – rediscovered in the nineteenth century:
“It is with the direct help of these bad demons, that every kind of sorcery is accomplished… it is the result of their operations, and men who injure their fellow-creatures by enchantments, usually pay great honors to these bad demons, and especially to their chief. These spirits pass their time in deceiving us, with a great display of cheap prodigies and illusions; their ambition is to be taken for gods, and their leader demands to be recognized as the supreme god.”
The spirit signing himself Swedenborg – just quoted from Davis’ Diakka, and hinting that he is the I AM, singularly resembles this chief leader of Porphyry’s bad demons.
What more natural than this vilification of the ancient and experienced theurgists by certain mediums, when we find Iamblichus, the expositor of spiritualistic theurgy, strictly forbidding all endeavors to procure such phenomenal manifestations; unless, after a long preparation of moral and physical purification, and under the guidance of experienced theurgists.
When, furthermore, he declares that, with very few exceptions, for a person “to appear elongated or thicker, or be borne aloft in the air”, is a sure mark of obsession by bad demons.”
H. P. Blavatsky