Number is the ruler of forms and ideas.

The ratio of positive to negative emotions that predicts flourishing is about 3 to 1. Above that ratio, people tend to flourish; below it, they tend to languish.

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.

We must balance profitability with purpose—that's the future of business.

我不画我所看到的，我画我所感受到的。

我们今天种下的每一棵树都是留给未来的遗产。