We must act, knowing that our work will be imperfect.

The United States does not have a monopoly on crazy people. It's not the only country that has psychosis. And yet we kill each other in these mass shootings at rates that are exponentially higher than anyone else. Well, what's the difference? The difference is that these guys can stack up a bunch of ammunition in their houses, and that's sort of par for the course.

As citizens, we understand that it is not about what America may do for us. It's about what can be done by us, together.

What is true, and I think that we can't deny it, is that some of the same concerns about globalization, about technology, rapid social change that were reflected in Brexit, that's been reflected in some of the debates in Germany and France and other places, that those exist in the United States as well. My view is that over the long term, over the next 10, 15, 20 years, if we are able to address the legitimate economic concerns of those who feel left behind by globalization, then many of these tensions will be reduced. And we will see a world that is less divided.

It's good to get fresh legs in [the White house]. I think that it refreshes our democracy.

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.

Learning to stand in somebody else's shoes, to see through their eyes, that's how peace begins. And it's up to you to make that happen. Empathy is a quality of character that can change the world.