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.

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.

Rich or poor, living in a trusting society simply makes people happier.

I trust only you and the dark always to look at me so honestly.

I don't feel bitterness, I don't feel anger towards anybody. Fighting is never emotional to me.

All wars eventually act as boomerangs and the victor suffers as much as the vanquished.

We take Aristotle seriously not when we write about his ideas, but when we take his ideas as part of our discussions.

Photography... has lived under the tyranny of its subject matter: the object has exercised an almost total domination.

Our love should not be just words and talk; it must be true love, which shows itself in action.

The happiness of London is not to be conceived but by those who have been in it.

Know that however difficult experiences may be, they are part of the truth you seek.

To me, politics is a pile of tricks.