When we were walking through the narrow alleys [of the Mathare Valley slums], it was literally impossible not to step in the raw sewage and the garbage alongside the little homes. But at the same time it was also impossible not to see the human vitality, the aspiration and the ambition of the people who live there.

Philanthropy is no longer about writing a check for $10,000 to the opera.

In today's world, the elites are growing even more comfortable with one another across national lines, yet at the same time, less comfortable with low-income people who share their nationality. How we create those bonds of community that are truly global as well as national is one of our generation's great challenges.

We need moral leadership and courage in our world.

There is power in creating a small model, and then you can create an alliance of other small models.

I wrote 'The Blue Sweater' to inspire more people to become engaged in working to solve the problems of global poverty.

As a young woman, I dreamed of changing the world. In my twenties, I went to Africa to try and save the continent, only to learn that Africans neither wanted nor needed saving. Indeed, when I was there, I saw some of the worst that good intentions, traditional charity, and aid can produce.