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The easiest way to test the effectiveness of a design is to ask the intended audience what they think about it.

Ellen Luptor

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Originality is nothing but judicious imitation.

Voltaire

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A person who never made a mistake never tried anything new.

Albert Einstein

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Both optimists and pessimists contribute to our society. The optimist invents the airplane and the pessimist the parachute.

Gil Stern

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When everything seems to be going against you, remember that the airplane takes off against the wind, not with it.

Henry Ford