challenge Quotes

It is very difficult to get people to focus on the most important things when you're in boom times.

I attempt an arduous task; but there is no worth in that which is not a difficult achievement.

The year I was born, 1955, the first big disease-eradication program in the world was declared for malaria. After about a decade of work, they realized that, at least in the tropical areas, they did not have the tools to get it done.

Serious sport is war minus the shooting.

I think Clinton, after getting into office and into Washington, was shocked at being bludgeoned. So he spent time trying to be all things to all people - one way guaranteed not to be successful or respected in a lion's den. You can't just play around with all those big cats - you've got to take somebody on.

Towering genius disdains a beaten path. It seeks regions hitherto unexplored.

When it comes to the pinch, human beings are heroic.

Just take terrorism, for example. We have a team of more than 200 people working on counterterrorism. I mean, that's pretty intense. That's not like what people think about what Facebook is.

Most people never believed in the real possibility of going to the moon, and neither did I until I was in my twenties.

When you have shot one bird flying you have shot all birds flying. They are all different and they fly in different ways but the sensation is the same and the last one is as good as the first.