Freedom is what beauty feels like when it can most express itself.

On the one hand, I loved being a banker. I loved how numbers could tell a story and how you can invest in ideas and see them translate into products and services and create jobs. What I didn't like, particularly where I was working in Brazil during the debt crisis of the early '80s, was how the poor were excluded from the banking system. I made the decision to try and experiment with whether we could use the tools of banking to extend the benefits of the economy to the poor.

I think I still have a great sense of adventure and trust, and am surprisingly idealistic given all the horrible things I've seen since I was 25. I think how I have changed is that I have a much deeper understanding of the dark forces in the world, of power.

Our actions - and inaction - touch people every day, people we may never know and never meet.

I finally understood: In order to contribute to Africa, I would have to know myself better and be clearer about my goals. I would have to be ready to take Africa on its own terms, not mine, and to learn my limits and present myself not as a do-gooder with a big heart, but as someone with something to give and gain by being there. Compassion wasn't enough

The human spirit is extraordinary. If we give the 3 billion people who live in poverty the opportunity to change their lives, they will. For too long, we've looked at needing to "save" these people - with an emphasis on "these people" - rather than removing the constraints keeping them from solving their own problems.

Sometimes the most important things that we do are things we cannot measure.