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Is there any knowledge in the world which is so certain that no reasonable man could doubt it?
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This idea of weapons of mass extermination is utterly horrible and is something which no one with one spark of humanity can tolerate. I will not pretend to obey a government which is organising a mass massacre of mankind.
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The reason that I call my doctrine logical atomism is because the atoms that I wish to arrive at as the sort of last residue in analysis are logical atoms and not physical atoms. Some of them will be what I call 'particulars' – such things as little patches of color or sounds, momentary things – and some of them will be predicates or relations and so on.
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A process which led from the amœba to man appeared to the philosophers to be obviously a progress – though whether the amœba would agree with this opinion is not known.
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To choose one sock from each of infinitely many pairs of socks requires the Axiom of Choice, but for shoes the Axiom is not needed.
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To be without some of the things you want is an indispensable part of happiness.
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I regard religion as a disease born of fear and as a source of untold misery to the human race.
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It is entirely clear that there is only one way in which great wars can be permanently prevented, and that is the establishment of an international government with a monopoly of serious armed force.
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I do wish I believed in the life eternal, for it makes me quite miserable to think man is merely a kind of machine endowed, unhappily for himself, with consciousness.
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To understand a name you must be acquainted with the particular of which it is a name.
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Political ideals must be based upon ideals for the individual life. The aim of politics should be to make the lives of individuals as good as possible.
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My desire and wish is that the things I start with should be so obvious that you wonder why I spend my time stating them. This is what I aim at because the point of philosophy is to start with something so simple as not to seem worth stating, and to end with something so paradoxical that no one will believe it.
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A logical theory may be tested by its capacity for dealing with puzzles, and it is a wholesome plan, in thinking about logic, to stock the mind with as many puzzles as possible, since these serve much the same purpose as is served by experiments in physical science.
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Mystery is delightful, but unscientific, since it depends upon ignorance.
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If, when a man writes a poem or commits a murder, the bodily movements involved in his act result solely from physical causes, it would seem absurd to put up a statue to him in the one case and to hang him in the other.
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Even when the experts all agree, they may well be mistaken.
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The governors of the world believe, and have always believed, that virtue can only be taught by teaching falsehood, and that any man who knew the truth would be wicked. I disbelieve this, absolutely and entirely. I believe that love of truth is the basis of all real virtue, and that virtues based upon lies can only do harm.
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Written words differ from spoken words in being material structures. A spoken word is a process in the physical world, having an essential time-order; a written word is a series of pieces of matter, having an essential space-order.
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Yes, if you happen to be interested in philosophy and good at it, but not otherwise – but so does bricklaying. Anything you're good at contributes to happiness.
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When people begin to philosophize they seem to think it necessary to make themselves artificially stupid.
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Why? Surely they can find other men.
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There is no need to worry about mere size. We do not necessarily respect a fat man more than a thin man. Sir Isaac Newton was very much smaller than a hippopotamus, but we do not on that account value him less.
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It is clear that thought is not free if the profession of certain opinions makes it impossible to earn a living.
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Nine-tenths of the activities of a modern Government are harmful; therefore the worse they are performed, the better.