"We are all broken by something. We have all been hurt by life in some way. But we can be mended. We can be made whole again."

"We are all descendants of successful maters, not unsuccessful ones, and this has shaped our mating psychology in profound ways."

"Every book is a door to another world, waiting to be opened by the curious mind."

Finding light in the darkness is the mission of every writer.

"The purpose of a writer is to keep civilization from destroying itself."

A good mathematician is someone who can see analogies between theorems. A great mathematician is someone who can see analogies between analogies.

We change our behavior when the pain of staying the same becomes greater than the pain of changing. Consequences give us the pain that motivates us to change.

节制欲念，修养身心，安贫乐道，摒除机巧，都是驱逐病魔的良方。

轧棉机的发明纯属偶然；那时我还很年轻，非常贫穷，对我来说从中实现一些价值是一个重要的目标。