"I am my brother's keeper. I am my sister's keeper."

"I'm not a fan of the idea that we can just be complacent our way to progress."

"We've got to reject the notion that somehow America is in decline. We've got to reject the notion that our best days are behind us."

"I learned to stop thinking about the world in terms of black and white, and started thinking about it in shades of gray."

"I have to say, I've never been accused of being a shrinking violet."