The only way to learn mathematics is to do mathematics.
和平不仅仅是没有战争，而是建立一个稳定、公正和可持续的国际秩序。
We are all haunted by the shadows of our former selves.
Every book is a journey, and every journey is a book.
快乐不是拥有得多，而是计较得少。
The writer’s role is to question, not to comfort.
To be or not to be,that's a question.