The psychologist must avoid all teleological interpretations.

每一个数学问题都是通向新理解世界的窗口。

Character is doing the right thing when nobody's looking. There are too many people who think that the only thing that's right is to get by, and the only thing that's wrong is to get caught.

数学推理可以相当系统地看作是对两种能力的结合运用，我们可以称之为直觉和独创性。