I like mathematics because it is not human and has nothing particular to do with this planet or with the whole accidental universe - because, like Spinoza's God, it won't love us in return.

Always remember that true happiness is not in getting what you want, but wanting what you already have. He who dies with the most toys is still dead. What is wanted is not the will to believe, but the will to find out, which is the exact opposite.

The commonest objection to birth control is that it is against nature.

Every housemaid expects at least once a week as much excitement as would have lasted a Jane Austen heroine throughout a whole novel.

There seems scarcely any limit to what could be done in the way of producing a good world, if only men would use science wisely.

The degree of one's emotions varies inversely with one's knowledge of the facts - the less you know the hotter you get.

Americans need rest, but do not know it. I believe this to be a large part of the explanation of the crime wave in the United States.