"Now therefore, since you do not yet understand how great darkness of ignorance surrounds you, meantime I wish to explain to you whence the worship of idols began in this world. And by idols, I mean those lifeless images which you worship, whether made of wood, or earthenware, or stone, or brass, or any other metals: of these the beginning was in this wise. Certain angels, having left the course of their proper order, began to favour the vices of men, and in some measure to lend unworthy aid to their lust, in order that by these means they might indulge their own pleasures the more; and then, that they might not seem to be inclined of their own accord to unworthy services, taught men that demons could, by certain arts—that is, by magical invocations—be made to obey men; and so, as from a furnace and workshop of wickedness, they filled the whole world with the smoke of impiety, the light of piety being withdrawn.