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It is a universal condition of the enjoyable that the mind must believe in the existence of a law, and yet have a mystery to move about in.

James Clerk Maxwell (1990). “The Scientific Letters and Papers of James Clerk Maxwell: 1846-1862”, p.248, CUP Archive
It is a universal condition of the enjoyable that the mind must believe in the existence of a law, and yet have a mystery to move about in.