There's no greater challenge and there is no greater honor than to be in public service.

This is not 1968 and the invasion of Czechoslovakia, where Russia can threaten its neighbors, occupy a capital, overthrow a government, and get away with it. Things have changed.

Great leaders never accept the world as it was and always work for the world as it should be

The sooner you learn that life is not fair, the better off you'll be, because you'll spend less time railing against life's unfairness and feeling aggrieved and entitled, and more time figuring out how to maximize your assets, and your talents and how to deal with things that you're not very good at.

We've been a country that's been fortunate to be protected by two oceans, to not have serious attacks on our territory for most of our history. And we were unfortunately reminded in a very devastating way of our vulnerability.

I'm actually genuinely optimistic about the United States and what's possible in the United States. And when you're out here, you see Americans across racial and economic and socioeconomic lines working together. And you maybe get a little bit less cynical than when you sit in the seat of kind of the epicenter of it all.

I don't think anybody can take the word of Saddam Hussein and his regime, and certainly an American president and allies who are obligated to worry about the safety and security of our countries, cannot take the word of this dictator, who lies, pathologically lies.