"Whether the psychological effect of color is direct...or whether it is the outcome of association, is open to question. The soul being one with the body, it may well be possible that a psychological tremor generates corresponding one through association."

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That's the way the mind works: the brain is genetically disposed towards organization, yet if not controlled, will link even the most imagerial fragment to another on the flimsiest pretense and in the most freewheeling manner, as if it takes a kind of organic pleasure in creative association, without regards to logic or chronological sequence.

— Tom Robbins