The whole difference between construction and creation is exactly this: that a thing constructed can only be loved after it is constructed; but a thing created is loved before it exists.

A writer is a mirror reflecting the soul of society.

Intolerance of ambiguity is the mark of an authoritarian personality.

经济发展理论研究的是经济系统如何产生不断改变它的力量。

代数是人类创造的一种智力工具，用于清晰地表达世界的数量关系。