宇宙将目光投向一个二维生物，它一生都在为后来成为地球的东西服务，它可以旅行数百万年，并且总是会回到它的起点，它永远不会意识到它上面或下面的是什么。

学习永远不会使心智枯竭。

We are all born with the idea of justice.

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.

【释义】随着时代的变迁而调整自己，而不是责怪他人。