我们唯一需要害怕的是恐惧本身的缺失。

我只想在我所做的事情上做到最好。

The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.

老年人相信每一件事物；中年人猜疑每一件事物；青年人什么都懂。

外交需要从战略和长远的角度思考，以实现国家的长期利益和安全。