Laugh at yourself, but don't ever aim your doubt at yourself. Be bold. When you embark for strange places, don't leave any of yourself safely on shore. Have the nerve to go into unexplored territory.

You have to leave the city of your comfort and go into the wilderness of your intuition. What you'll discover will be wonderful. What you'll discover is yourself.

I'm greedy for that satisfaction of doing something hard and knowing that, even though I was afraid I couldn't do it, that somehow I can deliver.

My relationship with science is as someone who's curious and hungry to know, hungry to understand. So all I have to offer is my ignorance and my curiosity, which is a good combination, as long as they come together.

Kids are natural scientists.

When your kids turn 13, an alien being invades their bodies and doesn't leave until they're 20.

The one hour live debate in the West Wing that we did was one of the most exciting times for me on stage or on camera, because anything could go wrong.