The problem with ideology is if you got an ideology, you already got your mind made up, you know all the answers, and that makes evidence irrelevant and argument a waste of time, so you tend to govern by assertion and attack. The problem with that is that discourages thinking and gives you bad results.

The secret to living a full life with no regrets and to staying young is to figure out what you believe in and fight for it. If you lose, don't give up. If you win, raise the bar, and then rare back and do something else. And remember that, with the accumulation of years, our responsibilities to the future grow greater, not less.

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.

[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.

To realize the full possibilities of this economy, we must reach beyond our own borders, to shape the revolution that is tearing down barriers and building new networks among nations and individuals, and economies and cultures: globalization. It's the central reality of our time.

When people think, Democrats win.

I tried marijuana once. I did not inhale.