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To save the world requires faith and courage: faith in reason, and courage to proclaim what reason shows to be true.
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It seems that sin is geographical. From this conclusion, it is only a small step to the further conclusion that the notion of 'sin' is illusory, and that the cruelty habitually practised in punishing it is unnecessary.
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One who believes, as I do, that the free intellect is the chief engine of human progress, cannot but be fundamentally opposed to Bolshevism, as much as to the Church of Rome.
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Life seems to me essentially passion, conflict, rage... It is only intellect that keeps me sane; perhaps this makes me overvalue intellect against feeling.
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The conception of the necessary unit of all that is resolves itself into the poverty of the imagination, and a freer logic emancipates us from the straitwaistcoated benevolent institution which idealism palms off as the totality of being.
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The idea that the poor should have leisure has always been shocking to the rich.
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I do not pretend to start with precise questions. I do not think you can start with anything precise. You have to achieve such precision as you can, as you go along.
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In democratic countries, the most important private organizations are economic. Unlike secret societies, they are able to exercize their terrorism without illegality, since they do not threaten to kill their enemies, but only to starve them.
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Probably in time physiologists will be able to make nerves connecting the bodies of different people; this will have the advantage that we shall be able to feel another man's tooth aching.
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Can a society in which thought and technique are scientific persist for a long period, as, for example, ancient Egypt persisted, or does it necessarily contain within itself forces which must bring either decay or explosion?
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Too little liberty brings stagnation, and too much brings chaos.
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Every great study is not only an end in itself, but also a means of creating and sustaining a lofty habit of mind.
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It is not by prayer and humility that you cause things to go as you wish, but by acquiring a knowledge of natural laws.
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There is darkness without and when I die there will be darkness within. There is no splendor, nor vastness anywhere; only triviality for a moment and then nothing.
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I like mathematics because it is not human and has nothing particular to do with this planet or with the whole accidental universe – because, like Spinoza's God, it won't love us in return.
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The facts of science, as they appeared to him Heraclitus, fed the flame in his soul, and in its light, he saw into the depths of the world.
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While it is true that science cannot decide questions of value, that is because they cannot be intellectually decided at all, and lie outside the realm of truth and falsehood. Whatever knowledge is attainable, must be attained by scientific methods; and what science cannot discover, mankind cannot know.
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Suppose atomic bombs had reduced the population of the world to one brother and one sister, should they let the human race die out? I do not know the answer, but I do not think it can be in the affirmative merely on the ground that incest is wicked.
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Three passions, simple but overwhelmingly strong, have governed my life: the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind. These passions, like great winds, have blown me hither and thither, in a wayward course, over a deep ocean of anguish, reaching to the very verge of despair.
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The Calculus required continuity, and continuity was supposed to require the infinitely little; but nobody could discover what the infinitely little might be.
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Thus mathematics may be defined as the subject in which we never know what we are talking about, nor whether what we are saying is true.
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People seem good while they are oppressed, but they only wish to become oppressors in their turn: life is nothing but a competition to be the criminal rather than the victim.
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It must not be supposed that the subjective elements are any less 'real' than the objective elements; they are only less important... because they do not point to anything beyond ourselves...
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Science is what we know, and philosophy is what we don't know.