The city's poor are like the roots of a tree: unseen, but essential to its survival.

Success is not about being the biggest, but about being the best at what you do.

La douleur est une porte ouverte sur quelque chose de plus grand qu'elle-même.

We want to build technology that everybody loves using, and that affects everyone. We want to create beautiful, intuitive services and technologies that are so incredibly useful that people use them twice a day. Like they use a toothbrush. There aren’t that many things people use twice a day.

作家是一个必须生活在世界上但不属于它的人。

The best stock to buy is the one you already own.