You must keep sending work out; you must never let a manuscript do nothing but eat its head off in a drawer. You send that work out again and again, while you're working on another one. If you have talent, you will receive some measure of success - but only if you persist.

No sensible decision can be made any longer without taking into account not only the world as it is, but the world as it will be.

A robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.

Jokes of the proper kind, properly told, can do more to enlighten questions of politics, philosophy, and literature than any number of dull arguments.

There is no Master but the Master,” he said, “and QT-1 is his prophet.

Postulates are based on assumption and adhered to by faith. Nothing in the Universe can shake them.

I don’t believe in extraordinary concatenations of coincidence.