Computers are famous for being able to do complicated things starting from simple programs.

All physical systems can be thought of as registering and processing information, and how one wishes to define computation will determine your view of what computation consists of.

I have not proved that the universe is, in fact, a digital computer and that it's capable of performing universal computation, but it's plausible that it is.

One of the things that I've been doing recently in my scientific research is to ask this question: Is the universe actually capable of performing things like digital computations?

Nothing in life is certain except death, taxes, and the second law of thermodynamics.

The history of the universe is, in effect, a huge and ongoing quantum computation. The universe is a quantum computer.

Thinking of the universe as a computer is controversial.

There are considerable advantages to using many degrees of freedom to store information, stability and controllability being perhaps the most important.

Of course, not everybody's willing to go out and do the experiments, but for the people who are willing to go out and do that, - if the experiments don't work, then it means it's not science.

In order to figure out how to make atoms compute, you have to learn how to speak their language and to understand how they process information under normal circumstances.

Indeed, as the above calculation indicates, to take full advantage of the memory space available, the ultimate laptop must turn all its matter into energy.

We are trying to find something to feel the void. It is only God who can fill the void.

Keep your cherished photos of your destiny at the fore-front of your mind. No one gets the gut to make them blurred. Always think about it

P-p-p-please, don’t cast me out

Being anti-war in Hollywood was an act of bravery on the order of the keynote speaker at a PLO dinner making jokes about Ariel Sharon.

The important thing is to strive toward a goal which is not immediately visible. That goal is not the concern of the mind, but of the spirit.

Take time to thank everyone who has helped you along the way.

Librarian of Congress: It's a librarian's dream.

Often, without being at all aware of it, men judge themselves, not by God's rule, but by their own.

Your folks are god, you love them and you want to make them happy but you still want to make up your own rules.

My wife and I, Delice and I, are empty nesters.