Setting clear goals and finding measures that will mark progress toward them can improve the human condition.

Ninety percent of the cases of polio are in security-vulnerable areas.

Money has no utility to me beyond a certain point.

Harnessing steam power required many innovations, as William Rosen chronicles in the book 'The Most Powerful Idea in the World.'

Take our 20 best people away, and I will tell you that Microsoft will become an unimportant company

Only through focus can you do world-class things, no matter how capable you are.

I read an hour almost every night. It's part of falling asleep.