我相信一切皆有因。人们改变是为了让你学会放手，事情出错是为了让你在它们正确时懂得珍惜。

I therefore have decided to read only the writings of men who have been executed or have risked their lives in some way.

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.