People put clips of me up. There are quotes from me. I've written books, of course. I'm on Twitter. There are dozens of ways to consume my offerings, and a lecture in a large venue is really only just one of them. So I have no concerns about how much access people would have to me no matter what is the capacity of your pocketbook.

Somehow it's O.K. for people to chuckle about not being good at math. Yet if I said, 'I never learned to read,' they'd say I was an illiterate dolt.

In modern times, if the sole measure of what’s out there flows from your five senses then a precarious life awaits you.

We only went to the moon for military reasons. The space enthusiasts of the day kept saying, "Oh, we're on the moon; we should be on Mars in ten years." That's if it was driven by exploration, but it's never been driven by exploration.

Photography is a form of time travel.

Wanting to do one thing can require that you take on other interests.

The more I learn about the universe, the less convinced I am that there's any sort of benevolent force that has anything to do with it, at all.