Energy is very primal stuff and there are a lot of leads that are promising, still at a fairly risky stage, but over the next decade some of these breakthrough approaches are going to pay out, and U.S. research and U.S. leadership on this should be part of how it gets solved.

Our work in global health is about things like cutting childhood deaths, and every year we continue to make progress there.

The idea of explaining why free trade is good, why immigration is good, why the world is so connected, that we need to think in terms of humanity and being generous to each other, you know, that's proving to be a challenge.

Exposure to the reproductions [of Corbis-owned fine art photographs] is likely to increase rather than diminish reverence for the real art and encourage more people to get out to museums and galleries.

A breakthrough in machine learning would be worth ten Microsofts.

(On being the world's richest man) I wish I wasn't ... There's nothing good that comes out of that. You get more visibility as a result of it.

It is hard to sell Congress and the American people on foreign aid. Is it harder to do that than it is to sell billionaires on the idea that they should give all their money away.