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.

抽象的目的不是模糊，而是创建一个新的语义层次，在这个层次上可以绝对精确。

The only way to do great work is to love what you do.

In the end, we are all alone. But that loneliness is what connects us all.