Our paper undertakes the research on the relation between the binary of faith: law and Gospel from a Christian studies perspective. The paper is divided into two main parts, the background of the issue (J.-M. Aubert) and a prospect towards a balanced understanding of the binary (author), the ideas of Thomas and John C. H. Wu on natural law will be treated. Christian tradition used to talk about the integration of the binary of faith at the end time of human history or eschatology, our paper proposes a new understanding of relationship: law and Gospel could be explained with the mode of existence to have (law) and to be (Gospel). Our idea is borrowed from E. Fromm and G. Marcel, where the influence of Meister Eckhart is read in the thought of the former.