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.
做这件事的唯一方法就是去做。
If you don't go through the tough times, you don't get to the good times.
所有资本中最有价值的是投资于人的资本。
写作是一种爱的行为。