言语是唯一永恒的东西。

The truth is rarely pure and never simple.

教师之为教，不在全盘授予，而在相机诱导。

"The colony is the place where the project of a new humanity is to be tested, where the dream of a world without borders is to be realized, where the dream of a world without races is to be realized, where the dream of a world without nations is to be realized."

In the world of mathematics, every question leads to another, creating an endless web of knowledge that connects all areas of science.

The only way to make sense out of change is to plunge into it, move with it, and join the dance.

有时候你必须被打倒得比以往任何时候都低，才能站得比以往任何时候都高。

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