"Mitt Romney is talking about the fact that Republicans and Democrats alike have to find common ground to address very real challenges we face as a country. It's a message that's uplifting, it's optimistic. It's about how America can be great again. I think that's the right closing message and I think frankly it's what we need to do as a country after this election regardless of what happens."

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The thing that makes me most optimistic is China and India - both of them doing well. It's amazing how much progress there's been in China, and also India. Those are the places that really matter - they're half of the world's population. They're the places where things are enormously better now than they were 50 years ago. And I don't see anything that's going to stop that.

— Freeman Dyson