Our generation, like the one before us, must choose. Without the threat of the Cold War, without the pain of economic ruin, without the fresh memory of World War II's slaughter, it is tempting to pursue our private agendas -- to simply sit back and let history unfold. We must resist the temptation.

The most profound security threat we face today is global warming....climate change has the capacity to change the way all of us live.

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.

I know that the precise magnitude and patterns of climate change cannot be fully predicted. But global warming clearly is a growing, long-term threat with profound consequences. And make no mistake about it, it will take decades to reverse.

From Bill Clinton speech- People are more impressed by the power of our example rather than the example of our power.

People will vote for someone who [they perceive] is strong and wrong before they will vote for someone who appears weak but is right.

North Koreans are irrational to some extent, but I don't think they're totally irrational. I think they watch American cable channels. I think they watch the European cable channels. I think they, their decision makers keep up more than we know. And I think they want us to think they're a little crazy.