——在广东和朋友谈自己的主张，1921年

在量子力学的领域里，观察者成为实验的一部分，仅仅通过观察的行为就改变了结果。

"In mathematics, we often seek elegance and simplicity, but in computer science, we must also consider practicality and efficiency."

I keep thinking about this river somewhere, with the water moving really fast. And these two people in the water, trying to hold onto each other, holding on as hard as they can, but in the end it’s just too much. The current’s too strong. They’ve got to let go, drift apart.

焦虑是自由的眩晕。