Ambition and hatred are enough to bring Iraq and al Qaeda together.

I have found that leadership is leadership is leadership. It applies whether you are in government or in corporate life or in non-profit life.

Don't just show kindness in passing or to be courteous. Show it in depth, show it with passion, and expect nothing in return. Kindness is not just about being nice; it's about recognizing another human being who deserves care and respect.

As I've thought about gay marriage, I don't see any reason not to say that [couples] should be able to get married.

Almost invariably, whoever doesn't win the argument is going to be unhappy.

I think the Iranians are clearly determined to have a nuclear program. And we have to assume that with a nuclear program they have the capability and the will to create a nuclear weapon.

I regret that the presentation I made at the UN turned out to be wrong. It was wrong on the stockpiles of weapons of mass destruction, but pretty much right on intentions and capabilities.