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There is no greater satisfaction for a just and well-meaning person than the knowledge that he has devoted his best energies to the service of the good cause.
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We know nothing at all. All our knowledge is but the knowledge of schoolchildren. The real nature of things we shall never know.
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Never let yourself be seduced by any problem, no matter how difficult.
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The only way to escape the corruptible effect of praise is to go on working.
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Insanity: doing the same thing over and over again and expecting different results.
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You cannot solve current problems with current thinking. Current problems are the result of current thinking.
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A life directed chiefly toward the fulfillment of personal desires will sooner or later always lead to bitter disappointment.
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If the workers of this world, men and women, decide not to manufacture and transport ammunition, it would end war for all time. We must do that. Dedicate our lives to drying up the source of war; ammunition factories.
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To get to know a country, you must have direct contact with the earth. It's futile to gaze at the world through a car window.
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Imagination is greater than knowledge.
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Common sense consists of those layers of prejudice laid down before the age of 18.
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He who finds a thought that lets us a little deeper into the eternal mystery of nature has been granted great peace.
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Don't dream of being a good person, be a human being is valuable and gives value to life.
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Yes, we now have to divide up our time like that, between politics and our equations. But to me our equations are far more important, for politics are only a matter of present concern. A mathematical equation stands forever.
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The payment of the worker is not determined by the value of his product.
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The daily struggle does not arise from a purpose or a program, but from an immediate need.
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Keep on sowing your seed, for you never know which will grow - perhaps it all will.
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If you want the answer to anything, go sit in Nature for awhile.
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I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
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The hardest thing in the world to understand is income taxes.
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Most people go on living their everyday life: half-frightened, half indifferent, they behold the ghostly tragic-comedy that is being performed on the international stage before the eyes and ears of the world.
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Scientists believe that every occurrence, including the affairs of human beings, is due to the laws of nature. Therefore a scientist cannot be inclined to believe that the course of events can be influenced by prayer, that is, by a supernaturally manifested wish.
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What interests me most is whether God could have made the world differently.
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Man has an intense desire for assured knowledge.