Iran's nuclear program . . . there was going to be a time limit . . .

Obviously I'm grayer, a few more wrinkles. One of the things I'm proud about is that I think my basic character and outlook actually have not changed much. And people who are closest to me will tell you that the guy who came here is the same guy who's leaving.

While we may not live to see the full realization of our ambition, we will have the satisfaction of knowing that the world we leave to our children will be better off for what we did.

Nothing will deter us from building the future we want for our children. What greater rejection of those who would tear down our world than marshaling our best efforts to save it.

What is the empathy deficit? The inability of people to stand in other folks shoes. It's hard to empathize with people who have different values than you

We should be more modest in our belief that we can impose democracy on a country through military force.

I believe that the free enterprise system is the greatest engine of prosperity the world's ever known.