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

Steve Jobs' ability to focus in on a few things that count, get people who get user interface right, and market things as revolutionary are amazing things.

There's life and death in every email.

So we do software for watches, for phones, for TV sets, for cars. And some of these take a long time to catch on.

Ridiculous sums of money can be confusing.

The year I was born, 1955, the first big disease-eradication program in the world was declared for malaria. After about a decade of work, they realized that, at least in the tropical areas, they did not have the tools to get it done.

This [philanthropy] work is even more fascinating. It requires us to think harder about how we build partnerships, who we get behind. And yet we get to see progress that in some ways is even more profound than the great advances that digital technology has provided.