I am grateful to President George W. Bush for PEPFAR, which is saving the lives of millions of people in poor countries and to both Presidents Bush for the work we've done together after the South Asia tsunami, Hurricane Katrina and the Haitian earthquake.

The established order has too many self-protecting economic entities, and not enough people who yet understand what it takes to change.

[Alternative energy] will make us less dependent on foreign oil. It would make us more secure in our future. It would mean that our foreign policy could be a reflection of our values and our other interests, and not just that.

You cannot have an integrated world and have your say all the time. America can lead the world towards that, but we cannot dominate and run the world in that direction. There is a big difference.

When we got organized as a country and we wrote a fairly radical Constitution with a radical Bill of Rights, giving a radical amount of individual freedom to Americans, it was assumed that the Americans who had that freedom would use it responsibly.

We know that when we protect our oceans we're protecting our future.

The real differences around the world today are not between Jews and Arabs; Protestants and Catholics; Muslims, Croats, and Serbs. The real differences are between those who embrace peace and those who would destroy it. Between those who look to the future and those who cling to the past. Between those who open their arms and those who are determined to clench their fists.