世界上充满了显而易见的事物，却没有人注意到它们。

制度的重要性有时比我们承认的要大。

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.

多元宇宙的概念是膨胀的自然结果，表明我们的宇宙可能只是众多宇宙中的一个。