3 It appears probable enough that this man possesses a demon as his familiar spirit, by means of whom he seems able to prophesy, and also enables as many as he counts worthy to be partakers of his Charis themselves to prophesy. He devotes himself especially to women, and those such as are well-bred, and elegantly attired, and of great wealth, whom he frequently seeks to draw after him, by addressing them in such seductive words as these: “I am eager to make you a partaker of my Charis, since the Father of all does continually behold your angel before His face.
Now the place of your angel is among us: it behooves us to become one. Receive first from me and by me [the gift of] Charis. Adorn yourself as a bride who is expecting her bridegroom, that you may be what I am, and I what you are. Establish the germ of light in your nuptial chamber. Receive from me a spouse, and become receptive of him, while you are received by him. Behold Charis has descended upon you; open your mouth and prophesy.” On the woman replying, “I have never at any time prophesied, nor do I know how to prophesy;” then engaging, for the second time, in certain invocations, so as to astound his deluded victim, he says to her, “Open your mouth, speak whatsoever occurs to you, and you shall prophesy.”
She then, vainly puffed up and elated by these words, and greatly excited in soul by the expectation that it is herself who is to prophesy, her heart beating violently [from emotion], reaches the requisite pitch of audacity, and idly as well as impudently utters some nonsense as it happens to occur to her, such as might be expected from one heated by an empty spirit. (Referring to this, one superior to me has observed, that the soul is both audacious and impudent when heated with empty air.)
Henceforth she reckons herself a prophetess, and expresses her thanks to Marcus for having imparted to her of his own Charis. She then makes the effort to reward him, not only by the gift of her possessions (in which way he has collected a very large fortune), but also by yielding up to him her person, desiring in every way to be united to him, that she may become altogether one with him.
Source: Adversus haereses (New Advent)