HKB
their natural knowledge, know certain things remote from men's knowledge, which they can reveal to men: although those things which God alone knows are remote simply and most of all.
Accordingly prophecy, properly and simply, is conveyed by Divine revelations alone; yet the revelation which is made by the demons may be called prophecy in a restricted sense. Wherefore those men to whom something is revealed by the demons are styled in the Scriptures as prophets, not simply, but with an addition, for instance as "false prophets," or "prophets of idols." Hence Augustine says (Gen. ad lit. xii, 19): "When the evil spirit lays hold of a man for such purposes as these," namely visions, "he makes him either devilish, or possessed, or a false prophet."
Reply Obj. 1: Cassiodorus is here defining prophecy in its proper and simple acceptation.
Reply Obj. 2: The demons reveal what they know to men, not by enlightening the intellect, but by an imaginary vision, or even by audible speech; and in this way this prophecy differs from true prophecy.
Reply Obj. 3: The prophecy of the demons can be distinguished from Divine prophecy by certain, and even outward, signs. Hence Chrysostom says [*Opus Imperf. in Matth., Hom. xix, falsely ascribed to St. John Chrysostom] that "some prophesy by the spirit of the devil, such as diviners, but they may be discerned by the fact that the devil sometimes utters what is false, the Holy Ghost never." Wherefore it is written (Deut. 18:21, 22): "If in silent thought thou answer: How shall I know the word that the Lord hath spoken? Thou shalt have this sign: Whatsoever that same prophet foretelleth in the name of the Lord, and it come not to pass, that thing the Lord hath not spoken."
SIXTH ARTICLE [II-II, Q. 172, Art. 6]
Whether the Prophets of the Demons Ever Foretell the Truth?
Objection 1: It would seem that the prophets of the demons never foretell the truth. For Ambrose [Hilary the Deacon (Ambrosiaster) on 1 Cor. 12:3] says that "Every truth, by whomsoever spoken, is from the Holy Ghost." Now the prophets of the demons do not speak from the Holy Ghost, because "there is no concord between Christ and Belial ['What concord hath Christ with Belial?']" (2 Cor. 6:15). Therefore it would seem that they never foretell the truth.
Obj. 2: Further, just as true prophets are inspired by the Spirit of truth, so the prophets of the demons are inspired by the spirit of untruth, according to 3 Kings 22:22, "I will go forth, and be a lying spirit in the mouth of all his prophets." Now the prophets inspired by the Holy Ghost never speak false, as stated above (Q. 111, A. 6). Therefore the prophets of the demons never speak truth.
Obj. 3: Further, it is said of the devil (John 8:44) that "when he speaketh a lie, he speaketh of his own, for the devil is a liar, and the father thereof," i.e. of lying. Now by inspiring his prophets, the devil speaks only of his own, for he is not appointed God's minister to declare the truth, since "light hath no fellowship with darkness [*Vulg.: 'What fellowship hath light with darkness?']" (2 Cor. 6:14). Therefore the prophets of the demons never foretell the truth.
On the contrary, A gloss on Num. 22:14, says that "Balaam was a diviner, for he sometimes foreknew the future by help of the demons and the magic art." Now he foretold many true things, for instance that which is to be found in Num. 24:17: "A star shall rise out of Jacob, and a scepter shall spring up from Israel." Therefore even the prophets of the demons foretell the truth.