Almost every way we make electricity today, except for the emerging renewables and nuclear, puts out CO2. And so, what we're going to have to do at a global scale, is create a new system. And so, we need energy miracles.

Students deserve great teachers. And teachers deserve the support they need to become great.

I meet people overseas that know five languages - that the only language I'm comfortable in is English.

WWW? Nice toy, but what a waste of time.

If success corrupts, I'm probably pretty corrupted by now.

I think of myself as a global citizen.

Giving money effectively is almost as hard as earning it in the first place.