A million million years gives us some time to prepare for the end . . . let us make the best of it.

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.

Belief in a Divine mission is one of the many forms of certainty that have afflicted the human race.

Another merit of home is that it preserves the diversity between individuals. If we were all alike, it might be convenient for the bureaucrat and the statistician, but it would be very dull, and would lead to a very unprogressive society.

I am delighted to know that Principia Mathematica can now be done by machinery. . . I am quite willing to believe that anything in deductive logic can be done by machinery.

I often long to . . . give up my life to love of my neighbour. This is really a temptation.

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