世界是一个谜，我们都是侦探。

世界是一个非常复杂的地方，而且它并没有变得简单。

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.

无论发生什么，你都必须继续前进。

最好的科学家是那些永不停止问为什么的人。