I see Americans of every party, every background, every faith who believe that we are stronger together: black, white, Latino, Asian, Native American; young, old; gay, straight; men, women, folks with disabilities, all pledging allegiance under the same proud flag to this big, bold country that we love. That's what I see. That's the America I know!

To love someone deeply gives you strength. Being loved by someone deeply gives you courage.

Let us permit nature to have her way. She understands her business better than we do.

If you want to make peace with your enemy, you have to work with your enemy. Then he becomes your partner.

I'm not as famous as Stephen Hawking, but certainly in the U.S., I have a very high profile for a scientist. It is an awesome responsibility, one that I don't shoulder lightly.