If you think your teacher is tough, wait till you get a boss.

Investing in innovation, which was my broad theme talking to [Warren Buffett ], that included health vaccines, it included energy and education.

When I say "an energy miracle," I mean that there will be some form of energy whose 24 hour cost really is competitive with hydrocarbons given, say, 20 years of learning curve. You invent it, then you look at how much its costs go down over the next 20 years, that it really beats hydrocarbons.

When we face a choice between adding features and resolving security issues, we need to choose security.

I have been struck again and again by how important measurement is to improving the human condition.

That it's a worldwide thing that families are better off.

We believe unbelievable progress can be made, in both inventing new vaccines and making sure they get out to all the children who need them.