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

Bertrand Russell

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

Act Fear Greatness Human Man Trust
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

Enemy Quite Religion World
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
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
Life is nothing but a competition to be the criminal rather than the victim.
BERTRAND RUSSELL

Crime Deep Life Philosophy Reality
Sometimes the hardest thing in life is to know which bridge to cross and which to burn.
BERTRAND RUSSELL

End Let Go Life
Of all forms of caution, caution in love is perhaps the most fatal to true happiness.
BERTRAND RUSSELL

Death Happiness Love True
The secret of happiness is very simple: let your interests be as wide as possible, and let your reactions to the things and persons that interest you be as far as possible friendly rather than hostile.
BERTRAND RUSSELL

Friendship Happiness Philosophy Secret Yourself
To write a tragedy, a man must feel the tragedy. To feel tragedy, a man must be aware of the world in which he lives. Not only with his mind, but with his blood and sinews.
BERTRAND RUSSELL

Deep Feeling Man Tragedy Writing
Extreme hopes are born from extreme misery.
BERTRAND RUSSELL

Born Hope Misery
Dogmatism is the greatest of mental obstacles to human happiness.
BERTRAND RUSSELL

Greatness Happiness Human Mental Obstacle
Mathematics rightly viewed possesses not only truth but supreme beauty.
BERTRAND RUSSELL

Beautiful Mathematics Truth View
One of the painful things about our time is that those who feel certainty are stupid, and those with any imagination and understanding are filled with doubt and indecision.
BERTRAND RUSSELL

Feeling Imagination Ourselves Pain Time Understand
Boredom is therefore a vital problem for the moralist, since at least half the sins of mankind are caused by the fear of it.
BERTRAND RUSSELL

Deep Fear Mankind Problem Sin
If there were in the world today any large number of people who desired their own happiness more than they desired the unhappiness of others, we could have paradise in a few years.
BERTRAND RUSSELL

Desire Happiness People Philosophy World
The only thing that will redeem mankind is cooperation.
BERTRAND RUSSELL

Healing Mankind Philosophy

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

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

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