Mathematics is not a spectator sport.
数学不是一项观赏性运动。
The brain is the most complex thing we have yet discovered in our universe.
You don’t have to be great to start, but you have to start to be great.
Don‘t bother fighting the old； just build the new.
写作是一种逃离世界的方式，也是一种拥抱世界的方式。