函数的概念在数学中是基础的，而λ演算试图使这一概念精确化。

A statement is a means to convey information， a promise is a means to make a commitment.

The past is never dead. It's not even past.

你停止尝试的那一刻，就是你开始失败的那一刻。

任何一样东西，你渴望拥有它，它就盛开。一旦你拥有它，它就凋谢。