The best scientific discoveries often happen at the boundaries between disciplines.

Every age has its pleasures, its style of wit, and its own ways.

《在北京五族共和合进会与西北协进会的演说》，1912年9月3日。

你知道得越多，理解得越少。

世界不是一个需要解决的问题，而是一个需要经历的神秘。