Since emotions are few and reasons are many (said the robot Giscard) the behavior of a crowd can be more easily predicted than the behavior of one person.

Self-education is a continuing source of pleasure to me, for the more I know, the fuller my life is and the better I appreciate my own existence

Before another century is done it will be hard for people to imagine a time when humanity was confined to one world, and it will seem to them incredible that there was ever anybody who doubted the value of space and wanted to turn his or her back on the Universe.

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

If you have talent, you will receive some measure of success - but only if you persist.

It is not so much that I have confidence in scientists being right, but that I have so much in nonscientists being wrong.

It was obvious that bigotry was never a one-way operation, that hatred bred hatred!