And fourthly, it is necessary that he who forms the voice should mean to express by means of that voice some concept of the mind to someone else, and that he should himself understand what he is saying; and so manage his voice by successively striking his teeth with his tongue in his mouth, by opening and shutting his lips, and by sending the air struck in his mouth into the outer air, that in this way the sound is reproduced in order in the ears of the hearer, who then understands his meaning.
To return to the point. Devils have no lungs or tongue, though they can show the latter, as well as teeth and lips, artificially made according to the condition of their body; therefore they cannot truly and properly speak. But since they have understanding, and when they wish to express their meaning, then, by some disturbance of the air included in their assumed body, not of air breathed in and out as in the case of men, they produce, not voices, but sounds which have some likeness to voices, and send them articulately through the outside air to the ears of the hearer. And that the likeness of a voice can be made without respiration of air is clear from the case of other animals which do not breathe, but are said to make a sound, as do also certain other instruments, as Aristotle says in the De Anima. For certain fishes, when they are caught, suddenly utter a cry outside the water, and die.
All this is applicable to what follows, so far as the point where we treat of the generative function, but not as regards good Angels. If anyone wishes to inquire further into the matter of devils speaking in possessed bodies, he may refer to S. Thomas in the Second Book of Sentences, dist. 8, art. 5. For in that case they use the bodily organs of the possessed body; since they occupy those bodies in respect of the limits of their corporeal quantity, but not in respect of the limits of their essence, either of the body or of the soul. Observe a distinction between substance and quantity, or accident. But this is impertinent.
For now we must say in what manner they see and hear. Now sight is of two kinds, spiritual and corporeal, and the former infinitely excels the latter; for it can penetrate, and is not hindered by distance, owing to the faculty of light of which it makes use. Therefore it must be said that in no way does an Angel, either good or bad, see with the eyes of its assumed body, nor does it use any bodily property as it does in speaking, when it uses the air and the vibration of the air to produce sound which becomes reproduced in the ears of the hearer. Wherefore their eyes are painted eyes. And they freely appear to men in these likenesses that they may manifest to them their natural properties and converse with them spiritually by these means.
For with this purpose the holy Angels have often appeared to the Fathers at the command of God and with His permission. And the bad angels manifest themselves to wicked men in order that men, recognizing their qualities, may associate themselves with them, here in sin, and elsewhere in punishment.
S. Dionysius, at the end of his Celestial Hierarchy, says: In all parts of the human body the Angel teaches us to consider their properties: concluding that since corporeal vision is an operation of the living body through a bodily organ, which devils lack, therefore in their assumed bodies, just as they have the likeness of limbs, so that have the likeness of their functions.
And we can speak in the same way of their hearing, which is far finer than that of the body; for it can know the concept of the mind and the conversation of the soul more subtly than can a man by hearing the mental concept through the medium of spoken words. See S. Thomas, the Second Book of Sentences, dist. 8. For if the secret wishes of a man are read in his face, and physicians can tell the thoughts of the heart from the heartbeats and the state of the pulse, all the more can such things be known by devils.
And we may say as to eating, that in the complete act of eating there are four processes. Mastication in the mouth, swallowing into the stomach, digestion in the stomach, and fourthly, metabolism of the necessary nutriment and ejection of what is superflous. All Angels can perform the first two processes of eating in their assumed bodies, but not the third and fourth; but instead of digesting and ejecting they have another power by which the food is suddenly dissolved in the surrounding matter. In Christ the process of eating was in all respects complete, since He had the nutritive and metabolistic powers; not, be it said, for the purpose of converting food into His own body, for those powers were, like His body, glorified; so that the food was suddenly dissolved in His body, as when one throws water on to fire.
How in Modern Time Witches perform the Carnal Act with Incubus Devils, and how they are Multiplied by this Means.
But no difficulty arises out of what has been said, with regard to our principal subject, which is the carnal act which Incubi in an assumed body perform with witches: unless perhaps anyone doubts whether modern witches practise such abominable coitus; and whether witches had their origin in this abomination.
In answering these two doubts we shall say, as to the former of them, something of the activities of the witches who lived in olden times,
