一个好的数学问题的定义是它产生的数学，而不是问题本身。
The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.
我不知道第三次世界大战会使用什么样的武器，但是我知道第四次世界大战会使用木棍和石块。
The past is already written. The ink is dry.
The true measure of our industry lies not in tonnes produced, but in communities sustained.
The moment you stop trying is the moment you stop learning.
Stories are light. Light is precious in a world so dark.