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.

M stands for Magic, Mystery, or Matrixaccording to taste

Only me, eh? Is that how you see yourself? Only you is worth a good deal more than you think.

Without doubt, without hesitation, I choose gardening over the gym. I can't stand going to the gym. It doesn't appeal to me at all. Give me gardening every time.

How could drops of water know themselves to be a river? Yet the river flows on.

Good golf is easier to play-and far more pleasant-than bad golf.

A golf swing is a collection of corrected mistakes.

Do you find coming to terms with the mindless tedium of it all presents an interesting challenge?

There is not a good work which the hand of man has ever undertaken, which his heart has ever conceived, which does not require a good education for its helper.

He who died in place of us is the one object of my quest. He who rose for our sakes is my one desire.

I'm constantly warning people that are involved in my life that I can go busk and make a living. I can make my rent in New York City in the subway, I promise, if I'm forced to.

I hope people like me and appreciate me the way I am.