"The only thing that is truly yours is your time."

人类最伟大的追求是了解自己必须做什么才能成为一个人。

"Every book is a conversation between the author and the reader."

数学的快乐来自于为理解而奋斗。

Sustainability isn't a department; it's a design principle that must permeate everything we create.

The mind is nature's answer to the challenges of existence.