Leadership is all about people. It is not about organizations. It is not about plans. It is not about strategies. It is all about people-motivating people to get the job done. You have to be people-centered.

Organization doesn't really accomplish anything. Plans don't accomplish anything, either. Theories of management don't much matter. Endeavors succeed or fail because of the people involved. Only by attracting the best people will you accomplish great deeds.

The information that the intelligence people used was a combination of satellite information, signals intelligence, and human intelligence. We are not sure to what extent Saddam [Hussein] was trying to convey an incorrect picture to us.

I happen to hold a bachelor of science degree in geology... And my greatest contribution to the field of science is that I never entered it.

Whenever you start-give it your best. The opportunities are there to be anything you want to be. But wanting to be someone isn't enough; dreaming about it isn't enough; thinking about it isn't enough. You've got to study for it, work for it, fight for it with all your heart and soul, because nobody is going to hand it to you.

I can't deny that it will be a historic event for an African-American to become president. And should that happen, all Americans should be proud - not just African-Americans, but all Americans - that we have reached this point in our national history where such a thing could happen. It will also not only electrify our country, I think it'll electrify the world.

My responsibility, our responsibility as lucky Americans, is to try to give back to this country as much as it has given us, as we continue our American journey together.