We weren't trying to just go public and get rich. There was no near-term thing. It always was this many-decades thing where there were no shortcuts and we'd sort of put one foot in front of the other.

If you're taking care of your family and society and are comfortable you can start to think about helping those most in need globally. That's how we became engaged in those things.

The first big effects will be farmers that live on the edge. Today's weather, they barely get by. Their kids, a high percentage are malnourished, and so if you impose more variable weather and more heat, you're getting more floods, more droughts, and during the germination time, the high heat, most crops...do poorly when there's more heat.

Going out in the field, it's always enlightening to see what's working and what's not and to sit down and talk - I was with young girls in south Africa - understanding why our tools for prevention aren't being adopted, and what way may need to invent to help protect them.

In three years, every product my company makes will be obsolete. The only question is whether we will make them obsolete or somebody else will.

Whenever there is hard work to be done, I assign it to the laziest man as he is sure to find an easy way of doing it. Be lazy, think crazy.

You wish that you could move more rapidly and you have setbacks. You know, the AIDS epidemic was a huge setback for Africa, and it's only through generosity that we've avoided that just completely crippling an entire generation there.