A mathematician's work is mostly a solitary pursuit, but it is also deeply collaborative.
Necessity knows no law.
最好的故事是让你质疑一切的故事。
人依靠自己的力量人才能生存，不依靠自己的力量人就不能生存。
The world owes all its onward impulses to men ill at ease. The happy man inevitably confines himself within ancient limits.
To be a moral human being is to pay, be obliged to pay, certain kinds of attention.