物质虽然可以极度分割，但并非无限可分。

Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.

时间并不存在。对于河水来说，只有当下。没有过去，没有未来。

我们在Facebook上试图做的事情，就是帮助人们更有效地连接和沟通。

The challenge is to make the invisible visible.