There are infinite possibilities of error, and more cranks take up fashionable untruths than unfashionable truths.
Of all forms of caution, caution in love is perhaps the most fatal to true happiness.
What we cannot think we cannot think, therefore we also cannot say what we cannot think.
The man who pursues happiness wisely will aim at the possession of a number of subsidiary interests in addition to those central ones upon which his life is built.
The human race may well become extinct before the end of the century. Speaking as a mathematician, I should say the odds are about three to one against survival.
Whenever you find yourself getting angry about a difference of opinion, be on your guard; you will probably find, on examination, that your belief is going beyond what the evidence warrants.
Half the useful work in the world consists of combating the harmful work.
Any pleasure that does no harm to other people is to be valued.
The legacy of Greece to Western philosophy is Western philosophy.
Conventional people are roused to fury by departure from convention, largely because they regard such departure as a criticism of themselves.
What men really want is not knowledge but certainty.
All who are not lunatics are agreed about certain things. That it is better to be alive than dead, better to be adequately fed than starved, better to be free than a slave. Many people desire those things only for themselves and their friends; they are quite content that their enemies should suffer. These people can only be refuted by science: Humankind has become so much one family that we cannot ensure our own prosperity except by ensuring that of everyone else. If you wish to be happy yourself, you must resign yourself to seeing others also happy.
It is possible that mankind is on the threshold of a golden age; but, if so, it will be necessary first to slay the dragon that guards the door, and this dragon is religion.
The teacher, like the artist, the philosopher, and the man of letters, can only perform his work adequately if he feels himself to be an individual directed by an inner creative impulse, not dominated and fettered by an outside authority.
If I were granted omnipotence, and millions of years to experiment in, I should not think Man much to boast of as the final result of all my efforts.
And if there were a God, I think it very unlikely that He would have such an uneasy vanity as to be offended by those who doubt His existence
Everything is vague to a degree you do not realize till you have tried to make it precise.
Drunkeness is temporary suicide: the happiness that it brings is merely negative, a momentary cessation of unhappiness.
What is wanted is not the will to believe, but the will to find out, which is the exact opposite.
There have been poverty, pestilence, and famine, which were due to man's inadequate mastery of nature. There have been wars, oppressions and tortures which have been due to men's hostility to their fellow men.
Philosophy, from the earliest times, has made greater claims, and achieved fewer results, than any other branch of learning.
The Ten Commandments should be headed like an examination paper: No more than six to be attempted.
The reformative effect of punishment is a belief that dies hard, chiefly I think, because it is so satisfying to our sadistic impulses.
The world that we must seek is a world in which the creative spirit is alive, in which life is an adventure full of joy and hope, based rather upon the impulse to construct than upon the desire to retain what we possess or to seize what is possessed by others.
In the daily lives of most men and women, fear plays a greater part than hope: they are more filled with the thought of the possessions that others may take from them, than of the joy that they might create in their own lives and in the lives with which they come in contact. It is not so that life should be lived.
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