Mothers might say they'd go to the doctor. In poor countries, moms are usually responsible for their kids' health. But breastfeeding and traveling to the clinic take time, and research shows that health care is one of the first tradeoffs women make when they're too busy.

I learn in a different way. I learn experientially.

Philanthropy is not about the money. It's about using whatever resources you have at your fingertips and applying them to improving the world.

You can't save kids just with vaccines.

[Bill Gates] wanted me to stay working at Microsoft, but I didn't think he could be CEO and we could have the family life that we both had growing up, which is what we envisioned. I knew I would go back to work at some point later to some profession. I just didn't know what.

You are indebted to life until you help some less fortunate person, just as you were helped.

Helping people doesn't have to be an unsound financial strategy.