There are no significant bugs in our released software that any significant number of users want fixed.

The need to communicate effectively with your customers will come up again and again.

Whenever you have a few setbacks, the idea that half as many children are dying now as back in 1990 and so... it was over 12 million a year, now it's less than 6 million a year. We have a clear path to get that under 3 million a year and we know what to do. And this generation of young Africans is a very large group.

Everyone knows about Black Friday and Cyber Monday. Now help me spread the word about Giving Tuesday!

If your culture doesn't like geeks, you are in real trouble.

There's no such thing as going to a soapbox and saying, 'The government's corrupt,' and not having the intelligence service see your face. In the digital world, that can be done.

If there was an epidemic, that definitely would make people accept vaccines. I wouldn't hope for that, of course, but if you wanted people to love vaccines, an epidemic would remind them how magical they are.