As far as extra dimensions are concerned, very tiny extra dimensions wouldn't be perceived in everyday life, just as atoms aren't: we see many atoms together but we don't see atoms individually.

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.

Who people think they are and what people think they want is not really who they are or what they want.

How well I know you by your deeds and how invariably you succeed in living down to what one expects of you!

You can't eat books, sweetheart.

Ordinary people know little of the time and effort it takes to learn to read. I have been eighty years at it and have not reached my goal.

I like the songwriting. I don't ever listen and then go back and change stuff. For me when I wrote the song, it's always really fun and exciting.

I love men in bed when they are sleeping. But then they have to go and wake up

The gloom of the world is but a shadow. Behind it, yet within our reach is joy. There is radiance and glory in the darkness could we but see - and to see we have only to look.

According to the international organization for migration, more than 1 million migrants have arrived in Europe this year, the most since World War II. Half of them were Syrian.

Braque always said that the only thing that counts, in painting, is the intention, and it's true. What counts is what one wants to do, and not what one does. That's what's important.

When I was a kid, I loved having a book in my hand. I still do. I wasn't a fast reader, but I was a steady reader. I read all of The Bobbsey Twins, Nancy Drew, and Cherry Ames books.