We will outstretch the hand if you unclench your fist.

In Europe, where the terrorist threat is probably greatest at the moment, the amount of information-sharing that's been taking place, the effectiveness of law enforcement across borders gives us the ability to protect ourselves while still being true to the basic precepts of our liberal democracies. I hope that that continues, and it is something that I think we should be worried about.

No other advanced nation endures this kind of violence. None. Here in America, the murder rate is three times what it is in other developed nations. The murder rate with guns is ten times what it is in other developed nations. And there's nothing inevitable about it. It comes about because of decisions we make or fail to make. And it falls upon us to make it different.

If you're a strong man, you should not feel threatened by strong women.

When I've sent young men and women into harm's way, I always understand that that is the last resort, not the first resort.

What I believe unites the people of this nation, regardless of race or region or party, young or old, rich or poor, is the simple, profound belief in opportunity for all - the notion that if you work hard and take responsibility, you can get ahead.

Sanctions alone could not stop Iran's nuclear program. But they did help bring Iran to the negotiating table.