One of the basic things about a string is that it can vibrate in many different shapes or forms, which gives music its beauty.

There was a long history of speculation that in quantum gravity, unlike Einstein's classical theory, it might be possible for the topology of spacetime to change.

There is a difference between knowing what is true and knowing why it is true

We know a lot of things, but what we don't know is a lot more.

I have a tendency, more than most other physicists, to try to figure out everything all at once, before I publish. And even to try to figure out everything in my head, without pencil and paper.

Im actually, for the most part, a complete agnostic politically.

So when you ask me how string theory might be tested, I can tell you what's likely to happen at accelerators or some parts of the theory that are likely to be tested.

I have a much easier time imagining how we would understand the big bang, even though we can't do it yet, than I can imagine understanding consciousness.

As of now, string theorists have no explanation of why there are three large dimensions as well as time, and the other dimensions are microscopic. Proposals about that have been all over the map.

One very important aspect of string theory is definitely testable. That was the prediction of supersymmetry, which emerged from string theory in the early '70s.

String theory is an attempt at a deeper description of nature by thinking of an elementary particle not as a little point but as a little loop of vibrating string.

I have lived one step away from losing my mind for years. I am quick and accurate in spotting unstable streaks in others.

I work in a strange business, and 'trust' is a word that's not even in the vocabulary.

So there are cakes and pillows and colors galore, but underneath this more obvious patchwork quilt are places like a quiet room where you can go and hold someone's hand and not have to say anything.

To a teenager, it cannot be true love if her family approves of him.

One of the principal motifs of Nietzsche's work is that Kant had not carried out a true critique because he was not able to pose the problem of critique in terms of values.

Like NASCAR race drivers or PGA golfers, why not require each of the [US presidential] candidates to cover their clothing, briefcases and staff with the logo patches of their corporate sponsors?

Marriage is the beginning and pinnacle of civilization.

We need radical thinking, creative ideas, and imagination.

It's amazing the fantasies your mind can put together.

The story of the human race is war. Except for brief and precarious interludes there has never been peace in the world; and long before history began murderous strife was universal and unending.