If we're all--conventional economic theory says, we're all relentlessly selfish and calculating.

传统的经济学理论的观点认为,人们都唯利是图,精于算计

耶鲁公开课 - 金融市场课程节选

The trouble with the etymology of theory and the way in which the word has been used traditionally is that sometimes it actually means practice, and then at other historical periods it means something very different from practice, something typically from which practice is derived.

理论这个词在词源,和传统的使用方法上的复杂之处在于,它有时候指的是实践，但在特定的历史时期,它指的是和实践非常不同的东西，也就是实践产生的依据。

耶鲁公开课 - 文学理论导论课程节选

Okay. So that's the basic distinction and, as I say, as far as I can see it's irreconcilable so it leaves us with a choice that really does have to be made, and it's a choice which looms over a course in literary theory and coming to understand the tradition of literary theory.

这就是二者基本的不同之处，我以前说过，只要二者不能兼容,我们就不得不从中选择一个，这个选择将会一直出现在文学理论课,和理解文学理论传统的过程中。

耶鲁公开课 - 文学理论导论课程节选