The deepest theorems in mathematics often have the simplest statements.
A building should be a fragment of the city, not an isolated object.
唯一比被人谈论更糟糕的事情就是没人谈论你。
The first draft is just you telling yourself the story.
学习古人的文章，必须先理解其思想内涵，然后再学习其文辞表达。
To do mathematics is to explore a universe of ideas, where the only limit is your imagination.