Search for role models you can look up to and people who take an interest in your career. But here's an important warning: you don't have to have mentors who look like you. Had I been waiting for a black, female Soviet specialist mentor, I would still be waiting. Most of my mentors have been old white men, because they were the ones who dominated my field.

You can never ask others to do something you would not do. That is integrity.

Separation of powers is a problem for foreign policy.

I've never really been a workaholic. I work very hard, but I also enjoy playing. I think it's important to have a balanced and well-rounded life.

The most important lesson I think I could impart is don't let anyone determine what your horizons are going to be. You get to determine those yourself. The only limitations are whatever particular talents you happen to have and how hard you're willing to work. And if you let others define who you ought to be, or what you ought to be because they put you in a category, they see your race, they see your gender and they put you in a category. You shouldn't let that happen.

I don't know anyone who is more admired and respected in the international community than President Karzai, for his strength, for his wisdom and for his courage to lead this country first in the defeat of the Taliban and now in rebuilding a democratic and unified Afghanistan. And I can tell you I am with foreign ministers and with heads of state all over the world. I sit in the councils of NATO. I sit with the EU. I sit with people all over the world and there is great admiration for your president and also for what the Afghan people are doing here.

My mom was a teacher - I have the greatest respect for the profession - we need great teachers - not poor or mediocre ones.