The boy and his heart had become friends, and neither was capable now of betraying the other.

There is only one boss. The customer. And he can fire everybody in the company from the chairman on down, simply by spending his money somewhere else.

建筑中的每一个细节都必须有一个目的，一个意义。

数学是关于概念之间关系的科学，与这些概念的内容无关。