If you ask for too much, you lose even that which you have.

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.

When one door of happiness closes another opens but often we look so long at the closed door that we do not see the one which has been opened for us.

Oh my brethren, Bold hearted men are always called mean-spirited by cowards!

You’re mine, Isabeau. You’ll always be mine. Make no mistake about it. Whether you choose to forgive me and give us a second chance, or you don’t, you’ll be my only.

That's what we all do: endlessly take the long way around.

Words can destroy. What we call each other ultimately becomes what we think of each other, and it matters.

Bought all the Beatle records, I sounded just like Paul.

It was an idealistic vision that generation had.

The way humans hunt for parking and the way animals hunt for food are not as different as you might think.

It's not the lack of resources that cause failure, it's the lack of resourcefulness that causes failure.