最好的艺术教育是教会学生如何观看。

The rule of recognition is the ultimate rule of a legal system.

The most important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.

数学家是能在定理间找到类比的人；更好的数学家能在理论间看到类比；而最优秀的数学家能注意到类比之间的类比。