When it comes to their capacity to screw things up, computers are becoming more human every day.

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?

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

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.

You're going to have dreams, but it's not all dreams are meant to come true

A distaste for the new is not always fear of the unknown, but sometimes ambition. Some people don't like the new way simply because they never got a chance to master the old way.

Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great.

The money-getter who pleads his love of work has a lame defense, for love of work at money-getting is a lower taste than love of money.

I think that many of my ideas are correct, but I'll bet you, before my death other discoveries will be made that will prompt me to alter various ideas I have about human evolution.

Obama came to power with this element of raising many new hopes and expectations but he's been fought back by the system, becoming almost paralyzed in a way.

Never would I allow my size to define me. Instead I would define it.

The future is completely open and we are writing it moment to moment.

Laughter is no enemy to learning