我希望，30年后你们还会再回到哈佛，想起你们用自己的天赋和能力所做出的一切。我希望，在那个时候，你们用来评价自己的标准，不仅仅是你们的专业成就，而包括你们为改变这个世界深刻的不平等所做出的努力，以及你们如何善待那些远隔千山万水、与你们毫不相干的人们，你们与他们唯一的共同点就是同为人类。
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.
Separate the processes of creation from improving. You can’t write and edit， or sculpt and polish， or make and analyze at the same time. If you do， the editor stops the creator. While you invent， don’t select. While you sketch， don’t inspect. While you write the first draft， don’t reflect. At the start， the creator mind must be unleashed from judgement.
每个词都是一个选择，而每个选择都带有后果。
A person who makes no mistakes usually doesn’t make anything.
The essence of mathematics lies in its freedom.