Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country.
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。
The most dangerous phrase in business is 'We've always done it this way.'
The future is not something we enter. The future is something we create.
What we gain by experience is more real and more solid than what we gain by reasoning.