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I simply imagine it so, then go about to prove it.
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On being reproached that his formula of gravitation was longer and more cumbersome than Newton's.
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Human beings, in their thinking, feeling and acting are not free agents but are as causally bound as the stars in their motion.
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My pacifism is an instinctive feeling, a feeling that possesses me because the murder of men is disgusting. My attitude is not derived from any intellectual theory but is based on my deepest antipathy to every kind of cruelty and hatred.
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Epistemology without contact with science becomes an empty scheme. Science without epistemology is-insofar as it is thinkable at all-primitive and muddled.
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Common to all these types is the anthropomorphic character of their conception of God. In general, only individuals of exceptional endowments, and exceptionally high-minded communities, rise to any considerable extent above this level. But there is a third stage of religious experience which belongs to all of them, even though it is rarely found in a pure form: I shall call it cosmic religious feeling. It is very difficult to elucidate this feeling to anyone who is entirely without it, especially as there is no anthropomorphic conception of God corresponding to it.
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That which is impenetrable to us really exists. Behind the secrets of nature remains something subtle, intangible, and inexplicable. Veneration for this force beyond anything that we can comprehend is my religion.
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As the area of light expands, so does the perimeter of darkness.
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The chicken did not cross the road. The road passed beneath the chicken.
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Of all the communities available to us, there is not one I would want to devote myself to except for the society of the true seekers, which has very few living members at any one time.
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I appeal to all men and women, whether they be eminent or humble, to declare that they will refuse to give any further assistance to war or the preparation of war.
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The consequence was a positively fanatic orgy of freethinking coupled with the impression that youth is being deceived by the state through lies; it was a crushing impression.
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Go out as far as you can go and start from there.
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We scientists, whose tragic destination has been to help in making the methods of annihilation more gruesome and more effective, must consider it our solemn and transcendent duty to do all in our power in preventing these weapons from being used for the brutal purpose for which they were invented.
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A theory is something nobody believes, except the person who made it. An experiment is something everybody believes, except the person who made it.
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When the Special Theory of Relativity began to germinate in me, I was visited by all sorts of nervous conflicts... I used to go away for weeks in a state of confusion.
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There is, however, one other human right which is infrequently mentioned but which seems to be destined to become very important: this is the right, or the duty, of the individual to abstain from cooperating in activities which he considers wrong or pernicious.
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You think you have troubles with mathematics . . . I assure you mine are still bigger.
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Watch the stars, and from them learn.
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The wireless telegraph is not difficult to understand. The ordinary telegraph is like a very long cat. You pull the tail in New York, and it meows in Los Angeles. The wireless is the same, only without the cat.
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If one asks the whence derives the authority of fundamental ends, since they cannot be stated and justified merely by reason, one can only answer: they exist in a healthy society as powerful traditions, which act upon the conduct and aspirations and judgments of the individuals; they are there, that is, as something living, without its being necessary to find justification for their existence.
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Every kind of peaceful cooperation among men is primarily based on mutual trust and only secondarily on institutions such as courts of justice and police.
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Anyone can be a genius, if they pick just one specific subject and study it diligently just 15 minutes each day.
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Development of Western science is based on two great achievements: the invention of the formal logical system in Euclidean geometry by the Greek philosophers, and the discovery of the possibility to find out causal relationships by systematic experiment during the Renaissance. In my opinion, one has not to be astonished that the Chinese sages have not made these steps. The astonishing thing is that these discoveries were made at all.