"You ask what is the use of classification, arrangement, and systemization? I answer you: order and simplification are the first steps toward the mastery of a subject - the actual enemy is the unknown."

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Let us suppose the mind to be, as we say, white paper, void of all characters, without any ideas; how comes it to be furnished? Whence comes it by that vast store which the busy and boundless fancy of man has painted on it with an almost endless variety? Whence has it all the materials of reason and knowledge? To this I answer, in one word, from experience.

— John Locke