We must develop as quickly as possible technologies that make possible a direct connection between brain and computer, so that artificial brains contribute to human intelligence rather than opposing it.

My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all.

I think the discovery of supersymmetric partners for the known particles would revolutionize our understanding of the universe.

Why are we here? Where do we come from? Traditionally, these are questions for philosophy, but philosophy is dead.

Being an American is life-threatening. For various reasons, men and women here don't live as long as men and women in about two dozen other countries, including the ones we defeated in World War II - Japan, Germany and Italy.

My commitment is to continue making a Mexico where families live in an environment of peace and better security.

To deal with these problems - of world population and hunger, of peace, of energy and mineral resources, of environmental pollution, of poverty - we must broaden and deepen our knowledge of nature's laws, and we must broaden and deepen our understanding of the laws of human behavior.

One of the themes of 'The Longest War,' my book, which came out before the Arab spring happened, was how al-Qaida and bin Laden was losing the war of ideas in the Muslim world, not because the United States was winning them, but because al-Qaida was simply losing them.