No matter the nationality, no matter the religion, no matter the ethnic background, America brings out the best in people.

Facebook is inherently viral. There are lots of sites that include a contact importer, and for lots of them it doesn't really make sense. For Facebook it fits so well. It wasn't until a few years in that we started building some tools that made it easier to import friends to the site. That was a huge thing that spiked growth.

Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity.

We could never learn to be brave and patient if there were only joy in the world.

'Tis the sharpness of our mind that gives the edge to our pains and pleasures.