Never stop learning—the world is always evolving.
在数学中，提出问题的艺术必须比解决问题更有价值。
I wish I could write as mysterious as a cat.
最有效的政策往往是最简单的。
You have to write the book that wants to be written. And if the book will be too difficult for grown-ups, then you write it for children.
不把别人所不懂的告诉别人，把别人知道的东西告诉别人。
The greatest victory is the victory over oneself.