"Every saint has a past, and every sinner has a future."

"There is always one moment in childhood when the door opens and lets the future in."

On pricing: "There are two kinds of companies， those that work to try to charge more and those that work to charge less. We will be the second."

"The very essence of romance is uncertainty."

The best programs are written so that computing machines can perform them quickly and so that human beings can understand them clearly. A programmer is ideally an essayist who works with traditional aesthetic and literary forms as well as mathematical concepts, to communicate the way that an algorithm works and to convince a reader that the results will be correct.

理论物理学的美丽在于它能够用几个简单的方程描述宇宙，揭示出表面复杂性之下的基础简单性。

他不爱我，他爱的是关于我的想法。