I feel certain that the personal computer is as revolutionary in terms of the way it will change the way we work, learn, and entertain ourselves as any of these previous advances.

When Ford sells a car, a dealer isn't allowed to take out the engine and put a different one in. When a newsstand sells the Washington Post, no one can go to the newsstand and pay them to rip out the classified section and put their own classified section in - if they could, they would do so.

I reboot [my Windows PC] every night.

Vaccines are a miracle; they're fantastic. Anything that makes people hesitate to give their children these vaccines according to the recommended schedule creates risk. Risk for the children who don't get vaccinated and risk for children, some of whom don't have an immune system, so they're benefiting from the fact that the community protection means the disease doesn't get to them.

Bioterrorism is like earthquakes, you should think in order of magnitudes. If you can kill 10 people that's a one, 100 people that's a two... Bioterrorism is the thing that can give you not just sixes, but sevens, eights and nines.

If you're smart, you often want a feedback loop so you know if what you've done is... is right.

We're only at the beginning of what we have to do here.