每个单子都是一面镜子，反映了整个宇宙的图景。
Each monad is a mirror that reflects the entire universe.
Marxian Socialism must always remain a portent to the historians of Opinion — how a doctrine so illogical and so dull can have exercised so powerful and enduring an influence over the minds of men， and， through them， the events of history.
Every challenge is an opportunity to grow stronger and wiser.
Mathematics is a language that allows us to describe the indescribable.
He who fights with monsters should be careful lest he thereby become a monster.