A neat and orderly laboratory is unlikely. It is, after all, so much a place of false starts and multiple attempts.

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.

Now don’t go thinking nice things about me. You’ll only be disappointed.

What often matters more than the activity we're doing at a moment in time is how we feel about it.

An optimist stays up until midnight to see the new year in. A pessimist stays up to make sure the old year leaves.

For a year, I had all sorts of weirdos coming on to me.

To me, the imagination is the ultimate renewable resource.

I'll pay them right after it snows in Panama. Let Eleta pay them if he feels so strongly about it.

Now the thing is not to get into unnecessary quarrels by talking too much and not to indicate any weakness by talking too much; let our actions speak for themselves.

We neither need a political revolution nor a religious revolution. What we need is an inner transformation in human beings.

I grew up in the Lower East Side of New York.

Give the opponents more than one reason to stare at your feet.