Aliester Crowley (very popular in the rock music world). Crowley gives instructions to the Satanist:
". . .train himself to think BACKWARDS by external means, as set forth here following.
(a) Let him learn to write BACKWARDS. . .
(b) Let him learn to walk BACKWARDS. . .
(c) Let him. . . listen to phonograph records REVERSED
(d) Let him practice speaking BACKWARDS. . .
(e) Let him learn to read BACKWARDS. . ."
(Aleister Crowley, Magick In Theory And Practice)

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