This page contains a collection of philosophical quotes by Bertrand Russell. These quotes are all genuine and details about the book and chapter number are included where applicable.
For my part, I believe that, partly by means of the study of syntax, we can arrive at considerable knowledge concerning the structure of the world.
– Bertrand Russell, An Inquiry into Meaning and Truth, XXV
On the law of excluded middle:
By the law of excluded middle, either ‘A is B’ or ‘A is not B’ must be true. Hence either ‘the present King of France is bald’ or ‘the present King of France is not bald must be true. Yet if we enumerated the things that are bald, and then the things that are not bald, we should not find the present King of France in either list. Hegelians, who love a synthesis, will probably conclude that he wears a wig.
– Bertrand Russell, ‘On Denoting’, Logic and Knowledge
Understanding words does not consist in knowing their dictionary definitions, or in being able to specify the objects to which they are appropriate. … Understanding language is more like understanding cricket: it is a matter of habits, acquired in oneself and rightly presumed in others. To say that a word has a meaning is not to say that those who use the word correctly have ever thought out what the meaning is. … The relation of a word to its meaning is of the nature of a causal law governing our use of the word and our actions when we hear it used. There is no more reason why a person who uses a word correctly should be able to tell what it means than there is why a planet which is moving correctly should know Kepler’s laws.
– Bertrand Russell, The Analysis of Mind, X
The process of sound philosophizing, to my mind, consists mainly in passing from those obvious, vague, ambiguous things, that we feel quite sure of, to something precise, clear, definite, which by reflection and analysis we find is involved in the vague thing that we start from, and is, so to speak, the real truth of which that vague thing is a sort of shadow.
– Bertrand Russell, ‘The Philosophy of Logical Atomism’, Logic and Knowledge
I once received a letter from an eminent logician, Mrs. Christine Ladd Franklin, saying that she was a solipsist, and was surprised that there were no others. Coming from a logician, this surprise surprised me.
– Bertrand Russell, Human Knowledge: Its Scope and Limits, III, 2
In every writer on philosophy there is a concealed metaphysic, usually unconscious; even if his subject is metaphysics, he is almost certain to have an uncritically believed system which underlies his specific arguments.
– Bertrand Russell, ‘Dewey’s New Logic’, The Philosophy of John Dewey, ed. P. A. Schilpp
On naive realism:
The observer, when he seems to himself to be observing a stone, is really, if physics is to be believed, observing the effects of the stone upon himself. Thus science seems to be at war with itself: when it most means to be objective, it finds itself plunged into subjectivity against its will. Naive realism leads to physics, and physics, if true, shows that naive realism is false. Therefore naive realism, if true, is false; therefore it is false.
– Bertrand Russell, An Inquiry into Meaning and Truth, Introduction
On science and value:
I conclude that, 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.
– Bertrand Russell, Religion and Science, IX
Pure mathematics consists entirely of assertions to the effect that, if such and such a proposition is true of anything, then such and such another proposition is true of that thing. It is essential not to discuss whether the first proposition is really true, and not to mention what the anything is, of which it is supposed to be true. Both these points would belong to applied mathematics. … 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. People who have been puzzled by the beginnings of mathematics will, I hope, find comfort in this definition.
– Bertrand Russell, Mysticism and Logic, V
Mathematics has ceased to seem to me non-human in its subject-matter. I have come to believe, though very reluctantly, that it consists of tautologies. I fear that, to a mind of sufficient intellectual power, the whole of mathematics would appear trivial, as trivial as the statement that a four-footed animal is an animal. I think that the timelessness of mathematics has none of the sublimity that it once seemed to me to have, but consists merely in the fact that the pure mathematician is not talking about time. I cannot any longer find any mystical satisfaction in the contemplation of mathematical truth.
– Bertrand Russell, My Philosophical Development, XVII
On A. N. Whitehead:
[Whitehead] said to me once: “You think the world is what it looks like in fine weather at noon day; I think it is what it seems like in the early morning when one first wakes from deep sleep.” I thought his remark horrid, but could not see how to prove that my bias was any better than his. At last he showed me how to apply the technique of mathematical logic to his vague and higgledy-piggledy world, and dress it up in Sunday clothes that the mathematician could view without being shocked.
– Bertrand Russell, Portraits from Memory, V
The method of Cartesian doubt, which appealed to me when I was young and may still serve as a tool in the work of logical dissection, no longer seems to me to have fundamental validity. Universal scepticism cannot be refuted, but also cannot be accepted. I have come to accept the facts of sense and the broad truth of science as things which the philosopher should take as data, since, though their truth is not quite certain, it has a higher degree of probability than anything likely to be achieved in philosophical speculation.
– Bertrand Russell, My Philosophical Development, XVI
I say quite deliberately that the Christian religion, as organized in its Churches, has been and still is the principal enemy of moral progress in the world.
– Bertrand Russell, Why I am Not A Christian
Since power over human beings is shown in making them do what they would rather not do, the man who is actuated by love of power is more apt to inflict pain than to permit pleasure.
– Bertrand Russell, Human Society in Ethics and Politics, II, II
On the British:
The British are distinguished among the nations of modern Europe, on the one hand by the excellence of their philosophers, and on the other hand by their contempt for philosophy. In both respects they show their wisdom.
– Bertrand Russell, Unpopular Essays, I
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