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。
Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country.
Life would be tragic if it weren't funny.
"History is not just about the past; it's about understanding the present and shaping the future."
I’m not perfect, and I don’t pretend to be.
The best songs come from pain.