But a man possessed by a devil can indirectly be relieved by the power of music, as was Saul by David’s harp, or of a herb, or of any other bodily matter in which there lies some natural virtue. Therefore such remedies may be used, as can be argued both from authority and by reason. For S. Thomas, XXVI, 7, says that stones and herbs may be used for the relief of a man possessed by a devil. And there are the words of S. Jerome.
And as for the passage in Tobias, where the Angel says: Touching the heart and the liver (which you took from the fish), if a devil or an evil spirit trouble any, we must make a smoke thereof before the man or the woman, and the party shall be no more vexed; S. Thomas says: We ought not to marvel at this, for the smoke of a certain tree when it is burned seems to have the same virtue, as if it has in it some spiritual sense, or power of spiritual prayer for the future.
Of the same opinion are Blessed Albert, in his commentary on S. Luke 9, and Nicolas of Lyra and Paul of Burgos,227 on 1 Samuel 16. The last-named homilist comes to this conclusion: that it must be allowed that those possessed by a devil can not only be relieved, but even entirely delivered by means of material things, understanding that in the latter case they are not very fiercely molested. And he proves this by reasoning as follows: Devils cannot alter corporeal matter just at their will, but only by bringing together complementary active and passive agents, as Nicolas says. In the same way some material object can cause in the human body a disposition which makes it susceptible to the operations of the devil. For example, according to physicians, mania very much predisposes a man to dementia, and consequently to demoniac obsession: therefore if, in such a case, the predisposing passive agent be removed, it will follow that the active affliction of the devil will be cured.
In this light we may consider the fish’s liver; and the music of David, by which Saul was at first relieved and then entirely delivered of the evil spirit; for it says: And the evil spirit departed from him. But it is not consonant with the meaning of the Scripture to say that this was done by the merits or prayers of David; for the Scripture says nothing of any such matter, whereas it would have spoken notably in his praise if this had been so. This reasoning we take from Paul of Burgos. There is also the reason which we gave in Question V of the First Part: that Saul was liberated because by the harp was prefigured the virtue of the Cross on which were stretched the Sacred Limbs of Christ’s Body. And more is written there which may be considered together with the present inquiry. But we shall only conclude by saying that the use of material things in lawful exorcisms is not superstitious. And now it is expedient that we should speak about the exorcisms themselves.
Chapter VI
Prescribed remedies; to wit, the lawful exorcisms of the Church, for all sorts of infirmities and ills due to witchcraft; and the method of exorcising those who are bewitched.
It has already been stated that witches can afflict men with every kind of physical infirmity; therefore it can be taken as a general rule that the various verbal or practical remedies which can be applied in the case of those infirmities which we have just been discussing are equally applicable to all other infirmities, such as epilepsy or leprosy, for example. And as lawful exorcisms are reckoned among the verbal remedies and have been most often considered by us, they may be taken as a general type of such remedies; and there are three matters to be considered regarding them.
First, we must judge whether a person who has not been ordained as an exorcist, such as a layman or a secular cleric, may lawfully exorcise devils and their works. Bound up with this question are three others: namely; first, what constitutes the legality of this practice; secondly, the seven conditions which must be observed when one wishes to make private use of charms and benedictions; and thirdly, in what way the disease is to be exorcised and the devil conjured.
Secondly, we must consider what is to be done when no healing grace results from the exorcism.
Thirdly, we must consider practical and not verbal remedies; together with the solution of certain arguments.
For the first, we have the opinion of S. Thomas in Book IV, dist. 23. He says: When a man is ordained as an exorcist, or into any of the other minor Orders, he has conferred upon him the power of exorcism in his official capacity; and this power may even lawfully be used by those who belong to no Order, but such do not exercise it in their official capacity. Similarly the Mass can be said in an unconsecrated house, although the very purpose of consecrating a church is that the Mass
