德里达的《在法的前面》解读了卡夫卡的同名寓言，并且通过文学分析展示他在解构主义方面的思想。解构主义的目的是暗中颠覆西方哲学中的传统观念。前人对这篇文章的解读已经覆盖了文中的主要观点并且解析了其中的解构策略,本文旨在探究界线在解构策略中的角色。 本文分为四个部分。第一部分概括两篇文章的大意并解释本文中讨论的界线的概念。根据德里达的理论，界线有三种形式：不合理的封闭，人类学边界，以及概念的划分。在寓言中，这三种形式的界线均以门的形式出现。第二部分集中讨论乡下人寻求法的本质的尝试中界线作为通向法的被禁止的通道。这部分首先揭露了界线在法的内外之间建立的错误的等级制度。此举挑战了逻各斯中心主义的基础——二元对立。第三部分探讨了界定法与文学领域的界线以及文学之内类型的界线。二、三部分中对形而上学的两个核心追求的求索均引向第四部分：不同事物处在普遍联系中，意义在不断生成中但永远不会到达——即延异。 本文得出结论，对界线的挑战也就是对逻各斯中心主义或形而上学的解构。对界线的挑战颠覆了逻各斯中心主义的基础——二元对立的特权地位。对界线的挑战探究了形而上学提出的两个最级问题，得出事物的本质是虚无的，否定了事物存在规律的绝对划分。界线为解构策略提供了一个可见的或者说可破坏的平台，由此解构得以实施。对界线的解构也就是对形而上学或逻各斯中心主义的解构。

Derrida’s “Before the Law” reflects on Kafka’s parable of the identical title and utilizes literary analysis to present his idea of deconstruction, which aims to undermine the very tradition of Western philosophy. Previous studies on Derrida’s “Before the Law” have already covered main points of the essay and explained its destructive strategies. This paper aims at exploring the role of the limit in deconstructive strategies. The paper is divided into four parts. The first part provides general understanding of the two texts and explains what is the limit in the discussion. According to Derrida, the limit has three forms: problematic closure, anthropological border, and conceptual demarcation. In the parable, the three forms of the limit are incarnated in the door. The second part concentrates on the discussion of limit as a prohibited passage to the law in the attempt of the countryman to know the essence of law. It first reveals the false hierarchy set by the limit between the inside and the outside of the law, which subverts the basis of logocentrism—binary opposition. The third part discusses the limit that demarcates the domain of law and literature and that of the genres within literature. The questioning of two ultimate goals of metaphysics in the second and the third parts leads to the fourth part that different things are in ubiquitous connections and the meaning arises but will never arrive—the différance. In conclusion, the challenge to the limit is the deconstruction of logocentrism or metaphysics. It subverts the privilege of binary opposition, the basis of logocentrism. It probes into the empty essence of things and denies the absolute division as the law of things, which are two ultimate questions raised in metaphysics. The limit provides deconstructive strategy a seeable or breakable platform, where it is possible for deconstruction to work on. Deconstruction of the limit is deconstruction of metaphysics or logocentrism.