Where once the student was taught that the unexamined life was not worth living, he is now taught that the profitably lived life is not worth examining.

When it comes to acid rain or oil spills or depleted fisheries or tainted groundwater or fluorocarbon propellants or radiation leaks or sexually transmitted diseases, national frontiers are simple irrelevant. Toxins don't stop for customs inspections and microbes don't carry passports. North America became a water and free-trade zone long before NAFTA loosened up the market in goods.

Having created the conditions that make markets possible, democracy must do all the things that markets undo or cannot do.

Where once the student was taught that the unexamined life was not worth living, he is now taught that the profitably lived life is not worth examining.

I divide the word into learners and nonlearners. There are people who learn, who are open to what happens around them, who listen, who hear the lessons. When they do something stupid, they don't do it again. And when they do something that works a little bit, they do it even better and harder the next time. The question to ask is not whether you are a success or a failure, but whether you are a learner or a nonlearner.

Independence used to be the ticket for liberty. But today, security and freedom, whether it's in the Arab Spring, whether it's in Iraq or whether it's right here in the United States, means working cooperatively and interdependently with others.

I don't divide the world into the weak and the strong, or the successes and failures...I divide the world into the learners and non-learners.