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.
Never demolish, never remove or replace, always add, transform, and reuse!
It’s OK to have your eggs in one basket as long as you control what happens to that basket.
Education is the great equalizer, but only if access to it is truly equal.