Dignity is more important than wealth.

After all this atrocity, this is how human beings really pray.

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.

I have also been touched by the dark side of power and leadership.

People have to understand that unless social enterprise is experimental, it will not succeed in making a difference.

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

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.