Africa can stun you in an instant. It can throw floods and drought and disease at you, sometimes all at the same time. In the next moment, it will tease you with its magnificent beauty, so even if you don't forget, you can find a way to forgive. Ultimately, it keeps you coming back for more.

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.

Dignity is more important than wealth.

How you see where you are always depends on where you've been.

When people gain income, they gain choice, and that is fundamental to dignity.

My dream is to find individuals who take financial resources and convert them into changing the world in the most positive ways.

Four billion people on Earth make less than four dollars a day.