The only way to do great work is to love what you do.
Geometry is knowledge of the eternally existent.
Scientific research should solve practical problems, not just stay on papers.
唯一真正的发现之旅,唯一永恒的青春之泉,不是去访问陌生的土地,而是拥有其他的眼睛,通过另一个人的眼睛,一百个人的眼睛,来观察宇宙,观察他们每个人所看到的一百个宇宙。