If you can't go to secondary school, the boys get to go and the girls don't, you're locked into a cycle of poverty, because you don't have a chance.

As a woman finds economic opportunity, even if she's only earning a couple of dollars a day, if she can save it on her phone, she then makes different decisions for her household than her husband might.

When were you born, who are your parents, where did you grow up? None of us earns these things. These things were given to us. So when we strip away all of our luck and our privilege, and we consider where we'd be without them, it becomes much easier to see someone who's poor and say, "That could be me." And that's empathy.

In places like India with smartphones, there's an app now for women if they're in a violent situation, they can press one button. They've given their cell-phone number to five trusted friends, and right away their GPS location goes out: "Here I am."

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.

Bill and I both firmly believe that even the most difficult global health problems can be solved.