"Therefore when a woman dips a twig in water and sprinkles the water in the air to make it rain, alhtough she does not herself cause the rain, and could not be blamed on that account, yet, because she has entered into a pact with the devil by which she can do this as a witch, although it is the devil who causes the rain, she herself nevertheless deserves the balme, becasue she is an infidel and does the devil's work, surrendering herself to his service.."
-- Maleus Maleficarum Part II Qn1.Ch11