"Among the learned there is a frenzy to differentiate between religion and magic, and whole shelves of books have been written upon the theme. The magician, it is explained, is one who professes to control the powers he deals with; the priest attempts only to propitiated them. The magician pretends to be able to work evil as well as good; the priest works only good. The magician deals with all sorts of shapes, some supernatural and others not; the priest deals only with gods and their attendant angles. The magician claims a control over material substances; the priest confines himself to spiritual matters."