473. Can a spirit temporarily assume the envelope of a living person – that is to say, can he introduce himself into an animate body, and act in the room and place of the spirit incarnated in it?
"A spirit does not enter into a body as you enter into a house. He assimilates himself to an incarnate spirit who has the same defects and the same qualities as himself, in order that they may act conjointly; but it is always the incarnate spirit who acts at his pleasure on the matter with which he is clothed. No other spirit can substitute himself in the place of the spirit who is incarnated in a given body, for a spirit is indissolubly united with his body until the arrival of the hour that has been appointed by Providence for the termination of his material existence."
474. If there be no such thing as "possession", in the ordinary sense of that term – that is to say, cohabitation of two spirits in the same body – is it possible for one soul to find itself dominated, subjugated, obsessed by another soul to such a point as that its will is, so to say, paralysed?
"Yes; and it is this domination which really constitutes what you call possession. But you must understand that this domination is never established without the participation of the spirit who is subjected to it, either through his weakness[1] or his free-will. Men have often mistaken for cases of possession what were really cases of epilepsy or madness, demanding the help of the physician rather than of the exorciser."
The word possession, in its common acceptation, presupposes the existence of demons – that is to say, of a category of beings of a nature essentially evil, and the cohabitation of one of those beings with the soul of a man in the body of the latter. Since there are no such beings as demons in the sense just defined, and since two spirits cannot inhabit simultaneously the same body, there is no such thing as "possession" in the sense commonly attributed to that word. The word possessed should only be understood as expressing the state of absolute subjection to which a soul in flesh may be reduced by the imperfect spirits under whose domination it has fallen.
475. Can a soul, of its own motion, drive away the evil spirits by whom it is thus obsessed, and free itself from their domination?
"You can always shake off a yoke if you are firmly resolved to do so.”
476. Might not the fascination exercised by the evil spirit be so complete that the person subjugated should be unaware of it; and, in such a case, might not a third person be able to put an end to the subjection? And what course should be taken by the latter to that end?
"The will-power of an upright man may be useful by attracting the co-operation of good spirits in the work of deliverance; for the more upright a man is, the more power he possesses, both over imperfect spirits to drive them away, and over good ones to draw them nearer. Nevertheless, even the best of men would be powerless in such a case, unless the subjugated person lent himself to the efforts made on his behalf, for there are persons who take delight in a state of dependence which panders to their depraved tastes and desires. In no case can one who is impure in heart exercise any liberating influence, for he is despised by the good spirits, and the bad ones stand in no awe of him."
477. Have formulas of exorcism any power over bad spirits?
"No; when bad spirits see any one seriously endeavouring to act upon them by such means, they laugh at him, and persist in their obsession."
478. Persons who are well-intentioned are sometimes obsessed; what are the best means of getting rid of obsessing spirits?
"To tire out their patience, to give no heed to their suggestions, to show them that they are losing their time. When they see that they can do nothing, they go away."
479. Is prayer efficacious as a means of putting an end to obsession?
"Prayer is always an efficacious means of obtaining help; but you must remember that the muttering of certain words will not suffice to obtain what you desire. God helps those who help themselves, but not those who limit their action to asking for help. It is therefore necessary for the person obsessed to do his utmost to cure himself of the defects which attract evil spirits to him."
480. What is to be thought of the casting out of devils, spoken of in the Gospels?
"That depends on the meaning you attach to the word devil. If you mean by that term a bad spirit who subjugates a human being, it is evident that, when his influence is destroyed, he will really be driven away. If you attribute a malady to the devil, you may say, when you have cured the malady, that you have driven the devil away. A statement may be true or false, according to the meaning attributed to certain words. The most weighty truths may appear absurd when you look only at the form under which they are presented, and when an allegory is taken for a fact. Get this principle well into your mind, and keep it there; for it is of universal application."
[1] The "weakness" which sometimes brings a human being under the power of spirit-tormentors, despite the strenuous resistance of his will, is always the punitive and expiatory result of his own wrong-doing, either in his present earthly life or in a former one. – TRANS.