One must expect a war between U.S.A. and U.S.S.R. which will begin with the total destruction of London. I think the war will last 30 years, and leave a world without civilised people, from which everything will have to build afresh - a process taking (say) 500 years.

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

Your writing is never as good as you hoped; but never as bad as you feared.

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 two theologians differ, since there is no criteria to which either can appeal, there is nothing for it but mutual hatred and an open or covert appeal to force.

The world is full of magical things patiently waiting for our wits to grow sharper.

More cranks take up unfashionable errors than unfashionable truths.

Life and hope for the world are to be found only in the deeds of love.