Your brain builds something from whatever mental flotsam and jetsam is in your head. Perhaps it’s a useful thing, an answer to a question you didn’t know you needed. Perhaps it’s just an interesting combination of thoughts put into a story. It’s dreaming, but you’re awake.

-[Rands]

…when you have a real important problem you don’t let anything else get the center of your attention – you keep your thoughts on the problem. Keep your subconscious starved so it has to work on your problem, so you can sleep peacefully and get the answer in the morning, free.

-[Richard Hamming]

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