There were timelines branching and branching, a mega-universe of universes, millions more every minute. Billions? Trillions? The universe split every time someone made a decision. Split, so that every decision ever made could go both ways. Every choice made by every man, woman, and child was reversed in the universe next door.

The dinosaurs became extinct because they didn't have a space program.

Spray a book with insect spray, drop it in a bag, add some mothballs and seal it. Put it in another bag and seal it. Another. The packages piled up on the floor, each a book sealed in four plastic envelopes.

There is no cause so good or noble that it will not attract fuggheads; and the fuggheads will get all the press.

I've spent a lot of my life among people brighter than myself.

In the world of words the imagination is one of the forces of nature.

In challenging a kzin, a simple scream of rage is sufficient. You scream and you leap.