Sustainability is not just about protecting the environment, it's about creating a system that works for everyone.

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.

I never buy a stock unless I understand the business.

最大的风险是不冒任何风险。