Instead of giving in to cynicism and division, let's move forward with the confidence and optimism and unity that define us as a people.

Acts of sacrifice and decency without regard to what's in it for you create a ripple effect. Ones that lift up families and communities, that spread opportunity.

We agreed that our economic and financial teams will remain in close contact as we stay focused on ensuring economic growth and financial stability.

I learned to slip back and forth between my black and white worlds. One of those tricks I had learned: People were satisfied so long as you were courteous and smiled and made no sudden moves. They were more than satisfied; they were relieved -- such a pleasant surprise to find a well-mannered young black man who didn't seem angry all the time.

We don't ask you to believe in our ability to bring change, rather, we ask you to believe in yours.

We know we can't stop every act of violence, every act of evil in the world, but maybe we could try to stop one act of evil, one act of violence.

The greatest threat to U.S. and global security is no longer a nuclear exchange between nations, but nuclear terrorism by violent extremists and nuclear proliferation to an increasing number of states.