Watch VoirFilms. All sympathetic magic is based upon two principles: the first called the Law of Similarity says that “likes produce likes,” or that an effect resembles its cause; the second, called the law of contagion or contact says that all things having been in contact with each other continue to react upon one and another at a distance even after they have been severed or disconnected. A fearful man meets a disquiet woman. Do you believe in magic?