并不存在一个自由美国和一个保守美国的区别 - 只有团结的美利坚合众国。

"A good illustration should tell a story on its own, without the need for words."

History is not the past. It is the method we have evolved of organizing our ignorance of the past.

一八一四年，俄、奥、普联军兵临巴黎城下，理工学校学生要求参战。后来，这句名言被刻在巴黎理工学校梯型大教室的天花板正中心，一直激励着该校师生奋发好学。