施于人而不忘，非天布也。
一个人做了好事应当忘记，不要念念不忘，更不要希冀别人回报。
如果你借了什么东西，试着在归还的时候把它变得比你借到时的状态更好。清洁它、打磨它、填充它。
Positive emotions are like nutrients for the mind, helping us grow and flourish.
当我们意识到维持现状的痛苦大于改变现状的痛苦时，我们就会改变自己的行为。
忠于自己，但永远保持开放学习的心态。
Openness and collaboration are accelerators for technological development.
走上绞刑台，迎向行刑的枪口，我自安之如泰。
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.