Of course, Israel cannot be expected to negotiate with anyone who is dedicated to its destruction. But while I know you have had differences with the Palestinian Authority, I believe that you do have a true partner in President Abbas.

It was basic research in the photoelectric field-in the photoelectric effect that would one day lead to solar panels. It was basic research in physics that would eventually produce the CAT scan. The calculations of today's GPS satellites are based on the equations that Einstein put to paper more than a century ago.

And Joe Biden, thank you for being the best Vice President I could ever hope for.

That's why I stand here tonight. Because for two hundred and thirty two years, at each moment when that promise was in jeopardy, ordinary men and women - students and soldiers, farmers and teachers, nurses and janitors - found the courage to keep it alive.

You're likable enough, Hillary.

Rather, my perceptions about how we solve problems in health care or education span across a whole range of areas. And I want to try to capture that complexity.

So don't get cynical. Cynicism didn't put a man on the moon. Cynicism has never won a war, or cured a disease, or built a business, or fed a young mind. Cynicism is a choice. And hope will always be a better choice.