I do have a favorite Zeppelin song, Larry, Black Dog.

I play a lot chamber music.As for something that's hard for me to play, before I leave this Earth I'm hoping to play Brahms' Second Piano Concerto.

I'm very glad my mother didn't let me quit piano lessons at age 10. She said I wasn't old enough or good enough to make that decision, and she was right. I remember at the time I was shocked. I did not like that my mother said those things to me. But when I got a chance to play with Yo-Yo Ma or more recently with Aretha Franklin, I thought, I'm really glad she said what she did.

If the strong exploit the weak, democracy will not be stable.

Truly remarkable leadership is not just about motivating others to follow, it's about inspiring them to become leaders themselves and setting the stage for even greater opportunities for future generations.

You do have to keep in mind as you're going through extraordinarily difficult circumstances, that if you stay true, true to your values, if you stay true to your principles, if you believe in these values, then you can work in that context to right policies that may not be working.

Most days are not overwhelmingly successful in your life. And what really marks whether you're going to be successful is how well you deal with the bad days, not how well you deal with the good ones.