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

Just start Don't wait for perfection. Just start and let the work teach you.

I feel like I'm a relentless, pragmatic, determined optimist.

May each of you live lives of immersion. They won't necessarily be easy lives. But in the end, it is all that will sustain us.

Dignity is more important than wealth.

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.

Africans didn't want saving, thank you very much, least of all not by me.