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I believe, indeed, that overemphasis on the purely intellectual attitude, often directed solely to the practical and factual, in our education, has led directly to the impairment of ethical values.
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My interest in science was always essentially limited to the study of principles.... That I have published so little is due to this same circumstance, as the great need to grasp principles has caused me to spend most of my time on fruitless pursuits.
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Insofar as mathematics is true, it does not describe the real world. Insofar as it describes the real world, it is not true.
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Newton wrote to Halley ... that he would not give Hooke any credit. That, alas, is vanity. You find it in so many scientists. You know, it has always hurt me to think that Galileo did not acknowledge the work of Kepler.
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What distinguishes the language of science from language as we ordinarily understand the word? ... What science strives for is an utmost acuteness and clarity of concepts as regards their mutual relation and their correspondence to sensory data.
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There is an atmosphere of well-sounding oratory that likes to attach itself to dress clothes. Away with it!
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Since I have introduced this term I had always a bad conscience. . . . I cannot help to feel it strongly and I am unable to believe that such an ugly thing should be realized in nature.
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Nobody knows how the stand of our knowledge about the atom would be without him. Personally, Niels Bohr is one of the amiable colleagues I have met. He utters his opinions like one perpetually groping and never like one who believes himself to be in possession of the truth.
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The strange thing about growing old is that the intimate identification with the here and now is slowly lost; one feels transposed into infinity, more or less alone, no longer in hope or fear, only observing.
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Most mistakes in philosophy and logic occur because the human mind is apt to take the symbol for the reality.
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The health of society thus depends quite as much on the independence of the individuals composing it as on their close political cohesion.
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When you are courting a nice girl an hour seems like a second.
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On the left-hand side of the field equation we may add the fundamental tensor guv, multiplied by a universal constant, -λ, at present unknown, without destroying the general covariance.
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Relativity is a purely scientific matter and has nothing to do with religion.
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Long hair minimizes the need for barbers; socks can be done without; one leather jacket solves the coat problem for many years; suspenders are superfluous.
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To obtain an assured favorable response from people, it is better to offer them something for their stomachs instead of their brains.
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With me every peep becomes a trumpet solo.
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The best design is the simplest one that works.
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The supreme task of the physicist is to arrive at those universal elementary laws from which the cosmos can be built up by pure deduction. There is no logical path to these laws; only intuition, resting on sympathetic understanding of experience, can reach them.
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The American lives even more for his goals, for the future, than the European. Life for him is always becoming, never being.
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How do I work? I grope.
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Don't be too hard on me. Everyone has to sacrifice at the altar of stupidity from time to time.
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I very rarely think in words at all. A thought comes, and I may try to express in words afterwards.
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Overemphasis of the competitive system and premature specialization on the ground of immediate usefulness kill the spirit on which all cultural life depends, specialized knowledge included.