Vaccines are extremely well tested; their safety is well understood. The false allegations about vaccines causing autism have been disproven. But there are still echoes out there confusing people.

I failed in some subjects in exam, but my friend passed in all. Now he is an engineer in Microsoft and I am the owner of Microsoft.

I reboot [my Windows PC] every night.

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

When AIDS emergency broke out and was killing millions in Africa, the Global Fund was created so that a level of generosity would show up and buy the medicines to save those lives.

[Smart] is an elusive concept. There's a certain sharpness, an ability to absorb new facts. To ask an insightful question. To relate to domains that may not seem connected at first. A certain creativity that allows people to be effective.

Now, we put out a lot of carbon dioxide every year, over 26 billion tons. For each American, it's about 20 tons. For people in poor countries, it's less than one ton. It's an average of about five tons for everyone on the planet. And, somehow, we have to make changes that will bring that down to zero.