数学中的合作是必不可少的；没有人能独自解决所有问题。
Collaboration in mathematics is essential; no one can solve all the problems alone.
The past is never dead. It's not even past.
不要让任何人告诉你你不能做什么。证明他们是错的。
The best designs are those that solve problems without drawing attention to themselves.
义务是由于对法则的敬重而产生的行为必要性。