The power of randomness in algorithms is often underestimated.

And I hope you will come back here to Harvard 30 years from now and reflect on what you have done with your talent and your energy. I hope you will judge yourselves not on your professional accomplishments alone, but also on how well you have addressed the world's deepest inequities…on how well you treated people a world away who have nothing in common with you but their humanity.

It's easier to ask forgiveness than it is to get permission.

使我们真正幸福的方法是热爱我们的工作，并在其中找到乐趣。