人惟有恐惧的时候方能勇敢。
Can a man still be brave if he’s afraid. That is the only time a man can be brave.
The essence of mathematics lies in its power to reveal patterns and symmetries.
Sustainable development requires not only vision but also concrete actions.
数学让我们看到支配周围世界的隐藏结构。
活着就是受苦，生存就是在苦难中找到某种意义。
世界上充满了破碎的故事，等待被修补。
事实是，每个人都会伤害你；你只需要找到那些值得你为之受苦的人。
I never stop learning and improving.