The world is full of obvious things which nobody by any chance ever observes.

真相很少是纯粹的，也从不简单。

——《在东京留日三团体欢迎会的演说》（1913年3月1日）

Reason obeys itself; and ignorance submits to whatever is dictated to it.

"The power of a story is in its ability to inspire forgiveness."

The Moving Finger writes; and, having writ, Moves on: nor all thy Piety nor Wit Shall lure it back to cancel half a Line, Nor all thy Tears wash out a Word of it.

数学中最深刻的见解往往来自最抽象的理论。