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.

追求幸福不是要一直感觉良好，而是要朝着有意义的目标努力。

Security and privacy are fundamental to the trust that users place in the Internet.

Innovation is not just about creating something new; it's about solving problems in ways that matter.

"The key is not to eliminate fear, but to control it."

Leadership is about making tough decisions with clarity and conviction.

You are no different than anybody else is.

你必须愿意失败，愿意犯错，愿意带着学到的教训重新开始。