Giving birth to something that could possibly change the lives of millions of people for possibly decades, hundreds of years, whatever the length of time the run is, is a great feeling.

What is an entrepreneur? Someone who jumps off a cliff and builds a plane on the way down.

Opportunities do not float like clouds in the sky. They're attached to people. If you're looking for an opportunity, you're really looking for a person.

It's nice to be happy. But the meaning of life is meaning - what's the impact you're having on the world. Suffering to accomplish that is a perfectly fine thing.

Ironically, in a changing world, playing it safe is one of the riskiest things you can do.

World-changing startups need to be premised on accurate contrarian theories.

The question is: how you cross uneven ground, how you assemble networks around you.