When you lose a customer, it can be tempting to tell each other, "That customer's not very sharp. They just made the wrong decision".

If you withdraw the incredible focus on polio, it will spread back, and in poor countries you'll get something like 100,000 cases a year. So by being very intense and getting the cases down to zero, what you do is you avoid all the future cases.

It is hard to sell Congress and the American people on foreign aid. Is it harder to do that than it is to sell billionaires on the idea that they should give all their money away.

If you want to build a great company, get the hell out of Silicon Valley.

Vision without execution is daydreaming.

In software you can't really add people and expect to get more done, because their ability to understand the program and what's going on it would require so much investment and all their work would require so much review that you'd be more likely to slow things down.

If you believe that all men are created equal, then a child's death in some other country is no less tragic than in the United States.