Some of my best leading men have been dogs and horses.

一切人类知识都源于经验。

To do things with words is not a special kind of doing， but a special kind of speaking.

挑战让生活变得有趣；克服挑战让生活变得有意义。

对于人类曾经信仰的大多数神，我们都是无神论者。有些人只是更进一步，连一个神都不信。