I worry that the weakness - particularly of our public schools - is going to make that less and less true for everybody. And if we ever lose that as our core, then we're going to lose our confidence. We're not going to lead. We're going to protect. We're going to turn inward. That would be very bad for the world. So as a former Secretary of State, I think I can advocate for education as a national security priority.

Once a month I play with a chamber music quartet. I play almost no solo music anymore because I so enjoy the interaction. The members of my quartet have become some of my best friends and so I really enjoy it now in ways that I didn't before.

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.

I've been an athlete all my life. I was a competitive figure skater, and then when I realized skating was not an adult sport I took up tennis and played that quite seriously from the time I was about 18.

I think the word of the United States has been as good as gold in its international dealings and its agreements.

When somebody underestimated me, it made me want to prove them wrong.

If I wrote a book, I had to be willing at least to talk about some of my struggles, whether in my personal life, health crises, or the deaths of my parents, because there can too easily be a perception of me that my life just went from A to Z uninterrupted, without any ups and downs, and that's not a fair representation.