The dangers that face the world can, every one of them, be traced back to science. The salvations that may save the world will, every one of them, be traced back to science.

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.

...There were no measures that truly protected against disaster you simply held on to what mattered and hoped that you found your way to the other side.

Under all speech that is good for anything there lies a silence that is better.

Not all speed is movement.

The world I live in is loathsome to me, but I feel one with the men who suffer in it

I had friends who ran off to become ski instructors or worked in cool bars, and I often envied them, but I know I'd quickly become bored with that kind of life. I always need to push myself.

How happy is he born and taught; that serves not another's will, whose armor is his honest thought and truth, his utmost skill.

This presents a serious question." They both looked at me. "What's that?" asked Lena. "Whether to start you off with a Doctor Who marathon or dive straight into Firefly.

With the black and white films, one was concerned with tone.

Right now we're in the midst of a grand experiment on how best to harness the incredible power of the Internet while we struggle to maintain useful boundaries among the different parts of our lives.

Why buy good luggage? You only use it when you travel.