勇气是生命为给予平静所要求的代价。

History is not the past. It is the method we have evolved of organizing our ignorance of the past.

地理带的研究揭示了自然界的统一性，尽管它表面上看起来多样。

人生就像一首歌，有高潮也有低谷，重要的是如何演绎。

We are not in the coffee business serving people, we are in the people business serving coffee.

本能的本质在于它独立于理性而被遵循。