Honour what is most beautiful about the past and build it into the promise of the future.

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

The only way we really create change is to enter any situation with the humility to listen and to recognize the world as it is, and then the audacity to dream what it could be, to have the patience to start and let the work teach you, to be willing to lead when you need to lead, and to listen. To have a sense of generosity and empathy, but not over-empathy, because accountability is so critical to building solutions that work.

Failure can be an incredibly motivating force.

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

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.

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.