How you staff, particularly the chief of staff, the national security adviser, your White House counsel, how you set up a process in the system to surface information and generate options for a president, understanding that ultimately the president is going to be the final decision-maker. That's something that has to be attended to right away.

In your generation, everybody is constantly bombarded with all kinds of different input from different cultures, and that's a strength, that's a positive thing. That's why I remain confident about America's ability to compete in the world, precisely because we've got a little bit of everybody in this country.

Writing has been an important exercise to clarify what I believe, what I see, what I care about, what my deepest values are. The process of converting a jumble of thoughts into coherent sentences makes you ask tougher questions.

Our country was born out of a desire to be free. And every day since, it's been protected by our men and women in uniform - people who believed so deeply in America, they were willing to give their lives for it.

I find it hard to believe that my God would consign four-fifths of the world to hell. I can't imagine that my God would allow some little Hindu kid in India who never interacts with the Christian faith to somehow burn for all eternity. That's just not part of my religious makeup.

We are on alert 24/7. And everything that you report will be investigated. We do it in private. We do it covertly. This could be a problem, it could simply be your neighbor having a bad day. But better be safe than sorry.

I'm not the caricature that you see on Fox News or Rush Limbaugh, but I'm somebody who is interested in solving problems and is pretty practical, and that, actually, a lot of the things that we've put in place worked better than people might think.