Small actions, when multiplied by millions of users, can change the world.
On pivoting: "If you're not stubborn， you'll give up on experiments too soon. And if you're not flexible， you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve."
真相并不总是美丽的，但追求真相总是高尚的。
The more we study the more we discover our ignorance.