Know your numbers' is a fundamental precept of business.

The power of capitalism to mediate the gap between rich and poor is pretty incredible. Indeed, I think, year by year, the gap gets less.

In 80% of the world, energy will be bought where it is economic. You have to help the rest of the world get energy at a reasonable price.

Bitcoin is a technological tour de force

We all know that there are these exemplars who can take the toughest students, and they'll teach them two-and-a-half years of math in a single year.

You need to understand things in order to invent beyond them.

If GM had kept up with technology like the computer industry has, we would all be driving $25 cars that got 1,000 MPG.