真相是，我们都有能力做出极大的恶和极大的善。是我们做出的选择定义了我们。

The journey of solving a mathematical problem is as important as the solution itself, for it teaches us patience, persistence, and the joy of discovery.

"A good book is a door to another world."

诗歌是一种游戏，但一种严肃的游戏。

国家是为法律而组织起来的人民。