All the hundreds of millions of people who, in their time, believed the Earth was flat never succeeded in unrounding it by an inch.

People who think they know everything are a great annoyance to those of us who do.

The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.

When stupidity is considered patriotism, it is unsafe to be intelligent.

So the universe is not quite as you thought it was. You'd better rearrange your beliefs, then. Because you certainly can't rearrange the universe.

In life, unlike chess, the game continues after checkmate.

People think of education as something that they can finish.

There are no nations! There is only humanity. And if we don't come to understand that right soon, there will be no nations, because there will be no humanity.

A robot may not injure a human being, or, through inaction, allow a human being to come to harm.

Violence is the last refuge of the incompetent.

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

Just pick a goal and stick to it―no big complicated secret.

But even her demons she invested with inordinate beauty, consecrated them with the dignity of her attention.

Science fiction is a way that I can go into the abstract, go into the imagination, and audiences are still willing to go along for the ride.

I'm going to save my public voice largely for the issues where I have some depth.

There must be an authority, and we believe that the most qualified authority in a household is the man's.

I just don't know what makes a movie catch on and other ones don't.

I think she suspects something, though. We’ve had cherry pie for dessert five nights in a row.” His voice drawled, and my smile deepened.

My culinary wardrobe is the same as my biking wardrobe, just no shoes.

The single biggest existential threat that's out there, I think, is cyber.

Be patient where you sit in the dark. The dawn is coming