世界
When I was in college， I wanted to be involved in things that would change the world.
On marketing: "In the old world， you devoted 30% of your time to building a great service and 70% of your time to shouting about it. In the new world， that inverts."
What is the one sentence summary of how you change the world? Always work hard on something uncomfortably exciting!
It really matters whether people are working on generating clean energy or improving transportation or making the Internet work better and all those things. And small groups of people can have a really huge impact.
If you’re changing the world, you’re working on important things. You’re excited to get up in the morning.