To understand the present, you must first understand the past.

The great challenge of our time is to create a world order that is both just and sustainable.

The universe we observe has precisely the properties we should expect if there is, at bottom, no design, no purpose, no evil and no good, nothing but blind, pitiless indifference.

数学是理性的音乐。

正是通过好奇心和以新方式看待机会，我们总是规划我们的道路。

你可以吃任何想吃的甜品——如果你可以只吃三口的话。