Is there any knowledge in the world which is so certain that no reasonable man could doubt it?

Our great democracies still tend to think that a stupid man is more likely to be honest than a clever man, and our politicians take advantage of this prejudice by pretending to be even more...

…It is necessary for the average citizen, if he wishes to make a living, to avoid incurring the hostility of certain big men. And these big men have an outlook – religious, moral, and political...

It is a natural propensity to attribute misfortune to someone’s malignity. When prices rise, it is due to the profiteer; when wages fall, it is due to the capitalist. Why the capitalist is ineffective when...

Ever since Plato most philosophers have considered it part of their business to produce ‘proofs’ of immortality and the existence of God. They have found fault with the proofs of their predecessors — Saint Thomas...

Never let yourself be diverted, either by what you wish to believe, or what you think could have beneficent social effects if it were believed; but look only and solely at what are the facts.

Neither a man nor a crowd nor a nation can be trusted to act humanely or to think sanely under the influence of a great fear.

One of the symptoms of an approaching nervous breakdown is the belief that one’s work is terribly important.

In all affairs it’s a healthy thing now and then to hang a question mark on the things you have long taken for granted.

I am sometimes shocked by the blasphemies of those who think themselves pious–for instance, the nuns who never take a bath without wearing a bathrobe all the time. When asked why, since no man can...

Those who have never known the deep intimacy and the intense companionship of happy mutual love have missed the best thing that life has to give.

To like many people spontaneously and without effort is perhaps the greatest of all sources of personal happiness.

Physics is mathematical not because we know so much about the physical world, but because we know so little; it is only its mathematical properties that we can discover.

When two men of science disagree, they do not invoke the secular arm; they wait for further evidence to decide the issue, because, as men of science, they know that neither is infallible. But when...

Science tells us what we can know, but what we can know is little, and if we forget how much we cannot know, we become insensitive to many things of great importance.

All the labor of all the ages, all the devotion, all the inspiration, all the noonday brightness of human genius are destined to extinction. So now, my friends, if that is true, and it is...

Philosophy, though unable to tell us with certainty what is the true answer to the doubts which it raises, is able to suggest many possiblities which enlarge our thoughts and free them from the tyranny...

I do not pretend to be able to prove that there is no God. I equally cannot prove that Satan is a fiction. The Christian god may exist; so may the gods of Olympus, or...

The skill of the politician consists in guessing what people can be brought to think advantageous to themselves; the skill of the experts consists in calculating what really is advantageous, provided people can be brought...

Never try to discourage thinking, for you are sure to succeed.

I believe that when I die I shall rot, and nothing of my ego will survive. I am not young and I love life. But I should scorn to shiver with terror at the thought...

Grammar and ordinary language are bad guides to metaphysics. A great book might be written showing the influence of syntax on philosophy.

Collective fear stimulates herd instinct, and tends to produce ferocity toward those who are not regarded as members of the herd.

One of the causes of unhappiness among intellectuals in the present day is that so many of them, especially those whose skill is literary, find no opportunity for the independent exercise of their talents, but...

If our logic is to find the common world intelligible, it must not be hostile, but must be inspired by a genuine acceptance such as is not usually to be found among metaphysicians.

The objection to propaganda is not only its appeal to unreason, but still more the unfair advantage which it gives to the rich and powerful.

There are two motives for reading a book; one, that you enjoy it; the other, that you can boast about it.

If all our happiness is bound up entirely in our personal circumstances it is difficult not to demand of life more than it has to give.

We see, surrounding the narrow raft illuminated by the flickering light of human comradeship, the dark ocean on whose rolling waves we toss for a brief hour; all the loneliness of humanity amid hostile forces...

That is the idea — that we should all be wicked if we did not hold to the Christian religion. It seems to me that the people who have held to it have been for...

When I was young, most teachers of philosophy in British and American universities were Hegelians, so that, until I read Hegel, I supposed there must be some truth to his system; I was cured, however,...

Patriots always talk of dying for their country but never of killing for their country.

When you come to look into this argument from design, it is a most astonishing thing that people can believe that this world, with all the things that are in it, with all its defects,...

What is wanted is not the will to believe, but the will to find out, which is the exact opposite.

If [a man] spent his money, say, in giving parties for his friends, they (we may hope) would get pleasure, and so would all those upon whom he spent money, such as the butcher, the...

The power of reason is thought small in these days, but I remain an unrepentant rationalist. Reason may be a small force, but it is constant, and works always in one direction, while the forces...

A drop of water is not immortal; it can be resolved into oxygen and hydrogen. If, therefore, a drop of water were to maintain that it had a quality of aqueousness which would survive its...

William James describes a man who got the experience from laughing-gas; whenever he was under its influence, he knew the secret of the universe, but when he came to, he had forgotten it. At last,...

War grows out of ordinary human nature.

Happiness, as is evident, depends partly upon external circumstances and partly upon oneself.

The methods of increasing the degree of truth in our beliefs are well known; they consist in hearing all sides, trying to ascertain all the relevant facts, controlling our own bias by discussion with people...

The importance of Man, which is the one indispensable dogma of the theologians, receives no support from a scientific view of the future of the solar system.

To teach how to live without certainty, and yet without being paralyzed by hesitation, is perhaps the chief thing that philosophy, in our age, can still do for those who study it.

Yo no nací dichoso. De niño, mi himno favorito era: «Cansado del mundo y con el peso de mis pecados». A los cinco años yo pensaba que si había de vivir setenta no había pasado...

Love is wise; hatred is foolish. In this world, which is getting more and more closely interconnected, we have to learn to tolerate each other, we have to learn to put up with the fact...

All human activity is prompted by desire.

The centre of me is always and eternally in terrible pain … A searching for something beyond what the world contains, something transfiguring and infinite.

What Galileo and Newton were to the seventeenth century, Darwin was to the nineteenth.

If the ordinary wage-earner worked four hours a day, there would be enough for everybody and no unemployment — assuming a certain very moderate amount of sensible organization. This idea shocks the well-to-do, because they...

There is much pleasure to be gained from useless knowledge.