Exploring the unknown requires tolerating uncertainty.

I'm comfortable with the unknown -- that's the point of science. There are places out there, billions of places out there, that we know nothing about. And the fact that we know nothing about them excites me, and I want to go out and find out about them.

And that's what science is.

So I think if you’re not comfortable with the unknown, then it’s difficult to be a scientist… I don’t need an answer. I don’t need answers to everything. I want to have answers to find.

You don't know how to live. You live.

Before you dive in head first, make sure the water is not shallow.

As every parent knows, children begin life as uninhibited, unabashed explorers of the unknown. From the time we can walk and talk, we want to know what things are and how they work - we begin life as little scientists.

I want the truth of things. But there's nowhere to find it.