Malleus Maleficarum

And the power of God is stronger than the power of the devil, so divine works are more true than demoniac operations. Whence inasmuch as evil is powerful in the world, then it must be the work of the devil always conflicting with the work of God. Therefore as it is unlawful to hold that the devil's evil craft can apparently exceed the work of God, so it us unlawful to believe that the noblest works of creation, that is to say, man and beast, can be harmed and spoiled by the power of the devil.