Black Magic is Not a Myth in Articles by Aleister Crowley.

“This is supposed to release the powers of evil and bring them into alliance. (It is rather the case of the mouse trying to make a friend of the cat!)” [via, also]

Consider also:

  1. “The ‘Black Mass’ is a totally different matter. I could not celebrate it if I wanted to, for I am not a consecrated priest of the Christian Church. The celebrant must be a priest, for the whole idea of the practice is to profane the Sacrament of the Eucharist. Therefore you must believe in the truth of the cult and the efficacy of its ritual.”
  2. “The priest must be careful, however, to consecrate the Host in the orthodox manner. The wine has been adulterated with magical drugs like deadly nightshade and vervain, but the priest must convert it into the blood of Christ.”
  3. “The clerk to the priest is a woman, and her dress, although it seems to be a church garment, is more like a costume in a prurient revue. It has been altered to make it indecent.”
  4. “A renegade priest gathers about him a congregation of sensation-hunters and religious fanatics; then only can the ceremonies of profanation be of extended black magical effect.”
  5. “The dreadful basis of the Mass is that the bread and wine have imprisoned the Deity. Then they are subjected to terrible profanations.”