“It is not easy to draw a clear distinction between magic and witchcraft. Both are concerned with the producing of effects beyond the natural powers of man by agencies other than the Divine (cf. OCCULT ART, OCCULTISM). But in witchcraft, as commonly understood, there is involved the idea of a diabolical pact or at least an appeal to the intervention of the spirits of evil. In such cases this supernatural aid is usually invoked either to compass the death of some obnoxious person, or to awaken the passion of love in those who are the objects of desire, or to call up the dead, or to bring calamity or impotence upon enemies, rivals, and fancied oppressors. This is not an exhaustive enumeration, but these represent some of the principal purposes that witchcraft has been made to serve at nearly all periods of the world’s history.”
Two of the best old books on the subject are THE GOLDEN BOUGH by Frasier and THE EVIL EYE by Elsworthy.