The older I get, the more determined I feel to do whatever I can to help release that human potential somehow. Not in a fluffy way nor in a hardcore way. But in that middle ground, that marriage of love and power. I'm not afraid of either.

Failure can be an incredibly motivating force.

The poor also are willing to make, and do make, smart decisions, if you give them that opportunity.

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

We can send people to the Moon; we can see if there's life on Mars - why can't we get $5 [mosquito] nets to 500 million people?

You should focus on being more interested than interesting.

When people gain income, they gain choice, and that is fundamental to dignity.