优秀的数学家应该既严谨又富有想象力。
A good mathematician should be both rigorous and imaginative.
The future we want must be invented. Otherwise we will get one which we don't want.
The value of a psychological concept is in its life application.
诸如此类。
只有真挚的爱才能让我结婚，这就是为什么我终将会成为一位老姑娘。