The world is a book, and those who do not travel read only a page.
世界就是一本书，不旅行的人只读了其中一页。
"The best ideas come when you're not trying to have ideas."
If you want to be the best, you have to be able to handle the worst.
The history of mathematics is a history of human curiosity and ingenuity.
Every line you draw should have a purpose, even if it's just to make someone smile.
The perfection of the work depends on the simplicity of the means.
