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“I'm glad I don't have to explain to a man from Mars why each day I set fire to dozens of little pieces of paper, and then put them in my mouth.”
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“You dont have to let your life be destroyed by diabetes. You can reclaim your life.”
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“I lack what the English call character, by which they mean the power to refrain.”
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“My remembrance of the past is a novel I am constantly recomposing; and it would not be a historical novel, but sheer fiction, if the material events which mark and ballast my career had not their public dates and characters scientifically discoverable.”
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“And I repeat: if there is anything that can divert the land of my birth from its current stampede into the Stone Age, it is the widespread dissemination of the thoughts and perceptions that Robert Heinlein has been selling as entertainment since 1939.”
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“If I have a swing, I have a shot.”
Source : "Biography/ Personal Quotes". www.imdb.com. 
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“So when one thought goes into your mind, it's not just one thought, it has to bounce off both hemispheres of the brain. When you're thinking about something happy, you're thinking about something sad. When you think about an apple, you also think about the opposite of an apple.”
Source : "Jaden and Willow Smith on Prana Energy, Time and Why School Is Overrated". Interview with Su Wu, tmagazine.blogs.nytimes.com. November 17, 2014.
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“To divide a cube into two other cubes, a fourth power, or in general any power whatever into two powers of the same denomination above the second is impossible, and I have assuredly found an admirable proof of this, but the margin is too narrow to contain it.”
Source : Scribbled note in the margins of his copy of Diophantus's Arithmetica. He did not live to provide the promised proof, and the conjecture became famous as Fermat's Last Theorem. In 1993 Andrew Wiles, a British mathematician, claimed to have discovered the proof.
