Now the Theologians have ascribed to them certain qualities, as that they are unclean spirits, yet not by very nature unclean. For according to Dionysius there is in them a natural madness, a rabid concupiscence, a wanton fancy, as is seen from their spiritual sins of pride, envy, and wrath. For this reason they are the enemies of the human race: rational in mind, but reasoning without words; subtle in wickedness, eager to hurt; ever fertile in fresh deceptions, they change the perceptions and befoul the emotions of men, they confound the watchful, and in dreams disturb the sleeping; they bring diseases, stir up tempests, disguise themselves as angels of light, bear Hell always about them; from witches they usurp to themselves the worship of God, and by this means magic spells are made; they seek to get a mastery over the good, and molest them to the most of their power; to the elect they are given as a temptation, and always they lie in wait for the destruction of men.
And although they have a thousand ways of doing harm, and have tried ever since their downfall to bring about schisms in the Church, to disable charity, to infect with the gall of envy the sweetness of the acts of the Saints, and in every way to subvert and perturb the human race; yet their power remains confined to the privy parts and the navel. See Job 41. For through the wantonness of the flesh they have much power over men; and in men the source of wantonness lies in the privy parts, since it is from them that the semen falls, just as in women it falls from the navel.
These things, then, being granted for a proper understanding of the question of Incubi and Succubi, it must be said that it is just as Catholic a view to hold that men may at times be begotten by means of Incubi and Succubi, as it is contrary to the words of the Saints and even to the tradition of Holy Scripture to maintain the opposite opinion. And this is proved as follows. S. Augustine in one place raises this question, not indeed as regards witches, but with reference to the very works of devils, and to the fables of the poets, and leave the matter in some doubt; though later on he is definite in the matter of Holy Scripture. For in his De Ciuitate Dei, Book 3, chapter 2, he says: We leave open the question whether it was possible for Venus to give birth to Aeneas through coition with Anchises. For a similar question arises in the Scriptures, where it is asked whether evil angels lay with the daughters of men, and thereby the earth was then filled with giants, that is to say, preternaturally big and strong men. But he settles the question in Book 5, chapter 23, in these words: It is a very general belief, the truth of which is vouched for by many from their own experience, or at least from heresay as having been experienced by men of undoubted trustworthiness, that Satyrs and Fauns (which are commonly called Incubi) have appeared to wanton women and have sought and obtained coition with them. And that certain devils (which the Gauls call Dusii) assiduously attempt and achieve this filthiness is vouched for by so many credible witness that it would seem impudent to deny it.
Later in the same book he settles the second contention, namely, that the passage in Genesis about the sons of God (that is Seth) and the daughters of men (that is Cain) does not speak only of Incubi, since the existence of such is not credible. In this connection there is the gloss which we have touched upon before. He says that it is not outside belief that the Giants of whom the Scripture speaks were begotten not by men, but by Angels or certain devils who lust after women. To the same effect is the gloss in Esaias 13,132 where the prophet foretells the desolation of Babylon, and the monsters that should inhabit it. He says: Owls shall dwell there, and Satyrs shall dance there. By Satyrs here devils are meant; as the gloss says, Satyrs are wild shaggy creatures of the woods, which are a certain kind of devils called Incubi. And again in Esaias 34, where he prophesies the desolation of the land of the Idumeans because they persecuted the Jews, he says: And it shall be an habitation of dragons, and a court for owls. The wild beasts also of the desert shall meet … The interlinear gloss interprets this as monsters and devils. And in the same place Blessed Gregory explains these to be woodland gods under another name, not those which the Greeks called Pans, and the Latins Incubi.
Similarly Blessed Isidore, in the last chapter of his 8th book, says: Satyrs are they who are called Pans in Greek and Incubi in Latin. And they are called Incubi from their practice of overlaying,133 that is debauching. For they often lust lecherously after women, and copulate with them; and the Gauls name them Dusii,134 because they are diligent in this beastliness. But the devil which the common people call an Incubus, the Romans called a fig Faun;135 to which Horace said, “O Faunus, lover of fleeing nymphs, go gently over my lands and smiling fields.”
As to that of S. Paul in 1 Corinthians 11, A woman ought to have a covering on her head, because of the angels, many Catholics believe that “because of the angels” refers to Incubi. Of the same opinion is the Venerable Bede in his History of the English;136 also William of Paris137 in his book De
