The great thing about cheap natural gas, again it's cheap, and it provides a cleaner alternative to coal. But it's still a fossil fuel, and because it's still a fossil fuel, it still emits carbon.

You always have to remember that Mother Nature is a lot like your body. If your temperature goes from 98.6 to 100.6, you don't feel so good. If it goes from 100.6 to 102.6, well, you call the doctor. If it goes from 102.6 to 104.6, you're in the emergency room at a hospital. The same with Mother Nature - small changes in global average temperatures have a huge climate effect.

We have to fight the terrorists as if there were no rules and preserve our open society as if there were no terrorists.

In a hyper-connected world where average is over, there is one thing we know absolutely for sure: Every good job will require more education.

Your boss doesn't care what you know, because the Google machine knows everything. Your boss cares about what you can do with what you know. That's the only thing your boss will pay for.

Geopolitics is all about leverage. We cannot make ourselves safer abroad unless we change our behavior at home.

When you lose your job, the unemployment rate isn't four percent, it's 100 percent.