Freedom is not the power to do what we want， but the right to do what we ought.

"Love is the only thing that can save us from ourselves, but it is also the most fragile and elusive of all emotions."

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."