Chapter XIV.
An objection, as to how we ought to believe that devils see into the thoughts of men.
Germanus: In this way, which you describe, those spirits cannot possibly see into our thoughts. But we think it utterly absurd to hold such an opinion, when Scripture says: "If the spirit of him that hath power ascend upon thee;" [1475] and again: "When the devil had put it into the heart of Simon Iscariot to betray the Lord." [1476] How then can we believe that our thoughts are not open to them, when we feel that for the most part they spring up and are nursed by their suggestions and instigation?
[1475] Eccl. x. 4.
[1476] S. John xiii. 2.
Chapter XV.
The answer what devils can and what they cannot do in regard to the thoughts of men.
Serenus: Nobody doubts that unclean spirits can influence the character of our thoughts, but this is by affecting them from without by sensible influences, i.e., either from our inclinations or from our words, and those likings to which they see that we are especially disposed. But they cannot possibly come near to those which have not yet come forth from the inmost recesses of the soul. And the thoughts too, which they suggest, whether they are actually or in a kind of way embraced, are discovered by them not from the nature of the soul itself, i.e., that inner inclination which lies concealed so to speak in the very marrow, but from motions and signs given by the outward man, as for example, when they suggest gluttony, if they have seen a monk raising his eyes anxiously to the window or to the sun, or inquiring eagerly what o'clock it is, they know that he has admitted the feeling of greediness. If when they suggest fornication they find him calmly submitting to the attack of lust, or see him perturbed in body, or at any rate not groaning as he ought under the wantonness of an impure suggestion, they know that the dart of lust is already fixed in his very soul. If they stir up incitements to grief, or anger, or rage, they can tell whether they have taken root in the heart by the movements of the body, and visible disturbances, when, for instance, they have noticed him either groaning silently, or panting with indignation or changing colour; and so they cunningly discover the fault to which he is given over. For they know that every one of us is enticed in a regular way by that one, to the incitement of which they see, by a sort of assenting motion of the body, that he has yielded his consent and agreement. And it is no wonder that this is discovered by those powers of the air, when we see that even clever men can often discover the state of the inner man from his mien and look and external bearing. How much more surely then can this be discovered by those who as being of a spiritual nature are certainly much more subtle and cleverer than men.
Chapter XVI.
An illustration showing how we are taught that unclean spirits know the thoughts of men.
For just as some thieves are in the habit of examining the concealed treasures of the men in those houses which they mean to rob, and in the dark shades of night sprinkle with careful hands little grains of sand and discover the hidden treasures which they cannot see by the tinkling sound with which they answer to the fall of the sand, and so arrive at certain knowledge of each thing and metal, which betrays itself in a way by the voice elicited from it; so these too, in order to explore the treasures of our heart, scatter over us the sand of certain evil suggestions, and when they see some bodily affection arise corresponding to their character, they recognize as if by a sort of tinkling sound proceeding from the inmost recesses, what it is that is stored up in the secret chamber of the inner man.
Chapter XVII.
On the fact that not every devil has the power of suggesting every passion to men.
But we ought to know this, that not all devils can implant all the passions in men, but that certain spirits brood over each sin, and that some gloat over uncleanness and filthy lusts, others over blasphemy, others are more particularly devoted to anger and wrath, others thrive on gloominess, others are pacified with vainglory and pride; and each one implants in the hearts of men that sin, in which he himself revels, and they cannot implant their special vices all at one time, but in turn, according as the opportunity of time or place, or a man, who is open to their suggestions, excites them.