数学不知道种族或地理界限；对于数学来说，文化世界是一个国家。

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

诗人是梦想家和疯子的兄弟。

Sometimes, the most dangerous lies are the ones we tell ourselves.

最大的荣耀不在于从不跌倒，而在于每次跌倒后都能站起来。