Strength does not come from physical capacity. It comes from an indomitable will.

我不是为了取悦别人而创作艺术，我是为自己创作的。

The only way to do great work is to love what you do.

如果数据不能证明索引获胜，那么数据是错误的。

In looking for someone to hire, you look for three qualities: integrity, intelligence, and energy. But the most important is integrity because if they don't have that, the other two qualities, intelligence and energy, are going to kill you.

The concept of computational complexity is not just about how fast we can compute, but also about understanding the limits of what can be computed.

And if you take Warren Buffett and watched him with a time clock, I would say half of all the time he spends is sitting on his ass and reading. And a big chunk of the rest of the time is spent talking one on one either on the telephone or personally with highly gifted people whom he trusts and who trust him. In other words, it looks quite academic, all this worldly success.

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.