Always listen to experts. They'll tell you what can't be done, and why. Then do it.

I don't know Who is cranking; I'm pleased He doesn't stop.

The best thing about space travel is that it made it possible to go elsewhere.

Butterflies are not insects,' Captain John Sterling said soberly. 'They are self-propelled flowers.

The bugs are not like us. The Pseudo-Arachnids aren’t even like spiders. They are arthropods who happen to look like a madman’s conception of a giant intelligent spider, but their organization, psychological and economic, is more like that of ants or termites; they are communal entities, the ultimate dictatorship of the hive.

Spacemen die if they stay in one place.

The second best thing about space travel is that the distances involved make war very difficult, usually impractical, and almost always unnecessary. This is probably a loss for most people, since war is our race's most popular diversion, one which gives purpose and color to dull and stupid lives. But it is a great boon to the intelligent man who fights only when he must-never for sport.