What we do is speak, and when we speak, of course, we say correctly that we "use" language, but we still need to know what language is and we need to understand the relationship between language and speech.

我们所说的，我们什么时候说，当然，说我们这是在使用语言，但是我们仍然要理解语言到底是什么,我们要理解语言和话语的关系。

耶鲁公开课 - 文学理论导论课程节选