I am a believer in unconscious cerebration. The brain is working all the time, though we do not know it. At night it follows up what we think in the … - Alexander Graham Bell

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I am a believer in unconscious cerebration. The brain is working all the time, though we do not know it. At night it follows up what we think in the daytime. When I have worked a long time on one thing, I make it a point to bring all the facts regarding it together before I retire; I have often been surprised at the results... We are thinking all the time; it is impossible not to think.