Sherlock Holmes on using the brain - Arthur Conan Doyle
I consider that a man's brain originally is like a little empty attic, and you have to stock it with such furniture as you choose... the skillful workman is very careful indeed as to what he takes into his brain-attic. He will have nothing but the tools which may help him in doing his work, but of these he has a large assortment, and all in the most perfect order... It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones.
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