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

“The dreadful basis of the Mass is that the bread and wine have imprisoned the Deity. Then they are subjected to terrible profanations.” [via, also]

Consider also:

  1. “The ceremony is a parody of the orthodox Mass, with blasphemous interpolations.”
  2. “There are many ways of abusing the Sacrament. One of the best known of which is the ‘Mass of Saint Secaire,’ the purpose of which is to cause an enemy to wither away.”
  3. “My enemies say that the celebration of the ‘Black Mass’ was one of the most innocuous of my activities in Sicily and in France.”
  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 explanation of its effects is that, if you believe passionately enough in your will to do something, then power to achieve it will accrue to you.”