Malleus Maleficarum

The First Part Treating of the Three Necessary Concomitants of Witchcraft, Which Are the Devil, a Witch, and the Permission of Almighty God

Here beginneth auspiciously the first part of this work. Question the First.

Whether the belief that there are such beings as witches is so essential a part of the Catholic faith that obstinately to maintain the opposite opinion manifestly savours of heresy. And it is argued that a firm belief in witches is not a Catholic doctrine: see chapter 26, question 5, of the work of Episcopus. Whoever believes that any creature can be changed for the better or the worse, or transformed into another kind or likeness, except by the Creator of all things, is worse than a pagan and a heretic. And so when they report such things are done by witches it is not Catholic, but plainly heretical, to maintain this opinion.

Moreover, no operation of witchcraft has a permanent effect among us. And this is the proof thereof: For if it were so, it would be effected by the operation of demons. But to maintain that the devil has power to change human bodies or to do them permanent harm does not seem in accordance with the teaching of the Church. For in this way they could destroy the whole world, and bring it to utter confusion.