I have all the world around me. My walls are 180 East Longitude and 90 North and 90 South Latitude.... Adventure is my guidon.

To love in spite of all is the secret of greatness. And may very well be the greatest secret in this universe.

You don't get rich writing science fiction. If you want to get rich, you start a religion.

When it comes to the Yellow Races overruning the world, you may laugh ... [The Chinese] have neither the foresight or endurance to overrun any white country in any way except by intermarriage. One American marine could stand off a great many yellowmen without much effort.

Unfortunately, it is all too often true that suppressors to a creative action must be removed before construction and creation takes place. Any person very high on the Tone Scale may level destruction toward a suppressor.

Affection can no more spoil a child than the sun could be put out by a bucket of gasoline.

Darwin found out that when you took horses up to the high country in the Middle East, they would then grow long hair after a season or two. But when you took them - these long-haired horses - back into the low, hot country, they wouldn't get rid of the long hair, just in case, for about four generations.