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It has been said that man is a rational animal. All my life I have been searching for evidence that could support this.

Bertrand Russell

Aristotle maintained that women have fewer teeth than men; although he was twice married, it never occurred to him to verify this statement by examining his wives’ mouths.
BERTRAND RUSSELL

Himself Man Marriage Woman
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.
BERTRAND RUSSELL

Knowledge Life Love Passion Search Simplicity Strong Suffering
Is there any knowledge in the world that is so certain that no reasonable man could doubt it?
BERTRAND RUSSELL

Doubt Knowledge Philosophy World
Fear is the parent of cruelty, and therefore it is no wonder if cruelty and religion have gone hand in hand.
BERTRAND RUSSELL

Deep Fear Hands Religion
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.
BERTRAND RUSSELL

Company Happiness Life Love
Sometimes the hardest thing in life is to know which bridge to cross and which to burn.
BERTRAND RUSSELL

End Let Go Life
I would never die for my beliefs because I might be wrong.
BERTRAND RUSSELL

Believe Death Myself Wrong
Few people can be happy unless they hate some other person, nation, or creed.
BERTRAND RUSSELL

Happiness Hate People Person
To fear love is to fear life, and those who fear life are already 3 parts dead.
BERTRAND RUSSELL

Death Fear Life Love Philosophy
To be able to fill leisure intelligently is the last product of civilization, and at present, very few people have reached this level.
BERTRAND RUSSELL

Intelligence Prepare Present
I hate being all tidy like a book in a library where nobody reads – prison is horribly like that.
BERTRAND RUSSELL

Book Hate Reading
The hardest thing to learn in life is which bridge to cross and which to burn.
BERTRAND RUSSELL

Burn Hard Learning Let Go Life
I do not myself feel that any person who is really profoundly humane can believe in everlasting punishment.
BERTRAND RUSSELL

Believe Feeling Myself Person Philosophy
The wise man thinks about his troubles only when there is some purpose in doing so; at other times he thinks about other things, or, if it is night, about nothing at all.
BERTRAND RUSSELL

Man Night Purpose Thinking Wisdom
The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.
BERTRAND RUSSELL

Doubt Problem Wisdom World
The most savage controversies are those about matters as to which there is no good evidence either way.
BERTRAND RUSSELL

Evidence Goodness Savage
Most people would sooner die than think; in fact, they do so.
BERTRAND RUSSELL

Death Deep People Philosophy Thinking
Man is a credulous animal, and must believe something; in the absence of good grounds for belief, he will be satisfied with bad ones.
BERTRAND RUSSELL

Absence Animal Believe Man Philosophy Satisfaction
Even if all the experts agree, they may well be mistaken.
BERTRAND RUSSELL

Mistake Science
A sense of duty is useful in work but offensive in personal relations. People wish to be liked, not to be endured with patient resignation.
BERTRAND RUSSELL

Endurance Patience People Relationship
It is a waste of energy to be angry with a man who behaves badly, just as it is to be angry with a car that won’t go.
BERTRAND RUSSELL

Angry Energy Philosophy Waste
Conquer the world by intelligence, and not merely by being slavishly subdued by the terror that comes from it.
BERTRAND RUSSELL

Deep Intelligence World
Love can flourish only as long as it is free and spontaneous; it tends to be killed by the thought of duty. To say that it is your duty to love so-and-so is the surest way to cause you to hate him of her.
BERTRAND RUSSELL

Freedom Hate Kill Love Philosophy Relationship
Philosophy, from the earliest times, has made greater claims, and achieved fewer results, than any other branch of learning.
BERTRAND RUSSELL

Greatness Learning Philosophy Time
None of our beliefs are quite true; all have at least a penumbra of vagueness and error.
BERTRAND RUSSELL

Believe Ourselves Philosophy Quite True
Language serves not only to express thought but to make possible thoughts that could not exist without it.
BERTRAND RUSSELL

Deep Existence Language Possible
Science may set limits to knowledge, but should not set limits to imagination.
BERTRAND RUSSELL

Imagination Knowledge Limitation Science

It has been said that man is a rational animal. All my life I have been searching for evidence that could support this.

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It has been said that man is a rational animal. All my life I have been searching for evidence that could support this.

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