The quality of a country's institutions is the single most important determinant of its long-term economic performance.

Every mathematical problem is a window into a deeper understanding of the world.

To write is to give voice to the silent, to make visible the unseen.

你注意力的质量决定了你生活的质量。

对于世界而言，你是一个人；但是对于某个人，你是他的整个世界。

The coldest winter I ever spent was a summer in San Francisco.

我不喜欢输，但这是比赛的一部分。重要的是你如何恢复。