The influence of Ahriman or Mephistopheles can bring it about that in order to attain occult knowledge a man is induced, for example, to undertake certain measures with his physical body. The method that consists in the use and misuse of the physical body is the most evil that can possibly be applied for the purpose of acquiring occult powers. It is a fact that in certain school of black magic such practices are taught in abundance. One of the most terrible perversions to which man may be subject occurs when the forces of the physical body are taken as the starting-point for occult training.
https://wn.rsarchive.org/Lectures/GA107/English/AP1954/19090101p01.html
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