The world is complicated and full of grays, but there's still truth there to be found.

Never give up on your dreams.

I am absolutely convinced that race relations on the whole are actually better now than they were 20 years [ago].

I've consistently said, we need to support charter schools. I think it is important to experiment, by looking at how we can reward excellence in the classroom.

The Internet and Twitter and all these things are very powerful, but it also means sometimes that instead of having a dialogue we just start calling folks - calling each other names. And that's true on the left or the right.

Today, more than ever before, science holds the key to our survival as a planet and our security and prosperity as a nation. It's time we once again put science at the top of our agenda and work to restore America's place as the world leader in science and technology.

Scientists and engineers ought to stand side by side with athletes and entertainers as role models.