When I give this talk to a physics audience, I remove the quotes from my 'Theorem'.

To tell you the truth, I've never met anybody who can envision more than three dimensions. There are some who claim they can, and maybe they can; it's hard to say.

I'd say many features of string theory don't mesh with what we observe in everyday life.

I can't stand clutter. I can't stand piles of stuff. And whenever I see it, I basically just throw the stuff away.

General relativity is in the old Newtonian framework where you predict what will happen, not the probability of what will happen. And putting together the probabilities of quantum mechanics with the certainty of general relativity, that's been the big challenge and that's why we have been excited about string theory, as it's one of the only approaches that can put it together.

All you are is a bag of particles acting out the laws of physics. That to me is pretty clear.

Time allows change to take place and the very evolution of the universe is what requires some conception of time. Mathematically can we write down a universe that doesn't have time? Sure. Do we think that would be realised in the larger reality that is out there? None of us take that possibility seriously.