Fertility is hereditary. If your parents didn't have any children, neither will you. I do not fear computers. I fear the lack of them.

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.

May your dreams be larger than mountains and may you have the courage to scale their summits.

Man is not valuable because he loves God. Man is valuable because God loves him.

But after this natural burst of indignation, no man of sense, courage, or prudence will waste his time or his strength in retrospective reproaches or repinings.

I'm the kind of woman that likes to enjoy herselves in peace.

People say 'Bill, are you an optimist?' And I say, 'I hope so.'

Let us not rush into a vast expansion of government power in a misguided attempt to protect freedom. In doing so, we will inevitably erode the very freedom we seek to protect.

I asked if I could read for the role of Kevin Costner's caddy in Tin Cup. It was a fun learning experience, even though Cheech Marin got the part.

It seems that for success in science or art, a dash of autism is essential.

Always knowing you're going to die And until then knowing you've got to live.

I still eat pizzas, I still like pies, I still have spaghetti hoops for breakfast... but it's in moderation now.