I don't care about movies. I tend to play badminton once a week.

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.

The citizens of Ludania would finally be free, no longer forced into a class system that determined what language they could speak, what jobs they could do, or who they could be

Any life truly lived is a risky business and if one puts up too many fences against the risks one ends by shutting out life itself.

We had incense and rock'n'roll posters, and we sold records and rolling papers. People could just, like, hang out. We had a cool vibe going.

The real test of any church or religion is the kind of men it makes.

You have to be willing to recognize failure.

The fact is I'm an opportunist. I'll take materials around me, materials on my table, and work with them as I'm searching for an idea that works.

Feel the Fear. Do it anyway!

I know this... a man got to do what he got to do.

I find the scientific mind horrendous. All those brains and not a moral imperative between them.

No one has ever described the place where I have just arrived: this is the emotion that makes me want to travel. It is one of the greatest reasons to go anywhere.