忠于你的心，它知道方向。

我打网球不是为了金钱或名声，而是因为我热爱它。

A mathematician's work is never truly finished; there is always more to explore.

农业中的每个挑战都是学习和成长的机会。

I like the idea that every life has its own rhythm, that people are not simply points moving through time.

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.