I believe that now and always the conscious selection of the best for reproduction will be impossible; that to propose it is to display a fundamental misunderstanding of what individuality implies. The way of nature has always been to slay the hindmost, and there is still no other way, unless we can prevent those who would become the hindmost being born. It is in the sterilization of failure, and not in the selection of successes for breeding, that the possibility of an improvement of the human stock lies.

If you are in difficulties with a book, try the element of surprise: attack it at an hour when it isn't expecting it.

For after the Battle comes quiet.

By the toll of a billion deaths man has bought his birthright of the earth, and it is his against all comers; it would still be his were the Martians ten times as mighty as they are. For neither do men live nor die in vain.

There comes a moment in the day when you have written your pages in the morning, attended to your correspondence in the afternoon, and have nothing further to do. Then comes that hour when you are bored; that's the time for sex.

Marriage isn't what it was. It's become a different thing because women have become human beings.

All men, however highly educated, retain some superstitious inklings.