自守形式的研究是数学思想统一性的反映。
Concerning the gods, I cannot know either that they exist or that they do not exist, nor what form they might have, for there is much to prevent one's knowing: the obscurity of the subject and the shortness of man's life.
我既找不到一个完全献身于我的朋友,我就必须有些能以其推动力克服我的惰性的朋友。
不光染丝是这样,国家也会被染。
The computer is just a tool. The pencil is also a tool. It's about how you use it.