First, I worry about climate change. It's the only thing that I believe has the power to fundamentally end the march of civilization as we know it, and make a lot of the other efforts that we're making irrelevant and impossible.

Cooperation will save the future. And America should lead it. Every time humanity has been in danger of extinguishing itself, our consciousness and our conscience have led us to come together. That's the big issue of the 21st century.

A world without walls is the only sustainable world. . . . If the world is dominated by people who believe that their races, their religions, their ethnic differences are the most important factors, then a huge number of people will perish in this century.

Effort, not ability, makes the biggest difference in achievement.

Old or young, healthy as a horse or a person with a disability that hasn't kept you down, man or woman, Native American, native born, immigrant, straight or gay - whatever; the test ought to be I believe in the Constitution, the Bill of Rights and the Declaration of Independence. I believe in religious liberty. I believe in freedom of speech. I believe in working hard and playing by the rules. I'm showing up for work tomorrow. I'm building that bridge to the 21st century. That ought to be the test.

India.. a perfectly wonderful country, may have been motivated by a lack of self-esteem.

I believe we have made a decision now that will permit us to create an economic order in the world that will promote more growth, more equality, better preservation of the environment, and a greater possibility of world peace, we are on the verge of a global economic expansion that is sparked by the fact that the United States at this critical moment decided that we would compete, not retreat.