If a conclusion is not poetically balanced, it cannot be scientifically true.

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.

Okay, but if you try to get me to pray with you, I walk.

I know my career is going badly because I'm being quoted correctly.

One of the great advantages of only publishing five books per year is that I get to be excited about every book.

Happy Ending I did with Paul Winfield. There was a play- within- the- play and I was his mother - which is a peculiar bit of casting, to say the least.

[Even if the U.S. doesn't attack] Saddam Hussein is not going to survive. His regime is on the verge of implosion.

I reverted easily to my wild state, that is experimentation.

I don't have time for lie-on-the-beach vacations. I'm a zoo person. There's one in New Jersey where animals actually come up to your car. I love the monkeys - I used to give them bubblegum to chew.

[The Constitution] is an experiment as all life is an experiment.

I ... [rely] upon the merits of Jesus Christ for a pardon of all my sins.