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

Our lives are so short. And our time on this planet is so precious. All we have is each other.

There are 60 million generators in Nigeria. The generator owners and distributors have a strong incentive to not encourage the distribution of solar and other alternative energies, even though it's better for the country, it's better for people. As a world, we've got to get more serious about confronting those obstacles. This knows no culture, no race, no ethnicity.

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

Nothing important happens in life without a cost.

A sustainable world means working together to create prosperity for all.

Poverty is too complex to be answered with a one-size-fits-all approach, and if there is any place that illustrates that complexity, as well as a better way forward, it is Rwanda.