"The psychology of the alchemist is that of reveries trying to constitute themselves in experiments on the exterior world. A double vocabulary must be established between reverie and experiment. The exaltation of the names of substances is the preamble to experiments on the "exalted" substances."

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King in Crimson is actually an alchemical term. King Crimson is a metaphor for Devil or Satan, but at the same time it's also a metaphor for one of the statures in the purification of man and the purification of mankind soul towards union with God and with Infinite, which is the philosophical aim of alchemists.

— Bruce Dickinson