"The only thing we know about the future is that it will be different."

"No institution can possibly survive if it needs geniuses or supermen to manage it."

"Rank does not confer privilege or give power. It imposes responsibility."

"Knowledge has to be improved, challenged, and increased constantly, or it vanishes."

"The most important thing in communication is hearing what isn't said."

"Management is doing things right; leadership is doing the right things."

"I have been struck again and again by how important measurement is to improving the human condition."

"Until we're educating every kid in a fantastic way, until every inner city is cleaned up, there is no shortage of things to do."

"I'm a big believer that as much as possible, and there's obviously political limitations, freedom of migration is a good thing."

"Life is not divided into semesters. You don't get summers off, and very few employers are interested in helping you find yourself."

"There is a certain responsibility that accrued to me when I got to this unexpected position."

"I do think this next century, hopefully, will be about a more global view."

"People always fear change. People feared electricity when it was invented, didn't they?"

"We've got to put a lot of money into changing behavior."

"I feel particularly lucky to do something every day that I love to do."