为了得到永生,一个人必须付出昂贵的代价;一个人必须在活着的时候死去多次。
Collaboration in mathematics is essential; no one can solve all the problems alone.
The smallest act of kindness is worth more than the grandest intention.
天赋是不够的。你需要纪律和奉献精神才能达到顶峰。
The human being needs sadness as much as he needs joy.