The novels of Marilynne Robinson have been seen as the primary source of insight into her theological reflections. The purpose of this study is to challenge this assumption by claiming that her essays are an essential theological companion to her novels. The study explores the theme of mystery in Robinson’s essays and selects three episodes from the Gilead trilogy to show how the same theme emerges in the novels. The study also claims that Robinson employs contrasting methods of discourse to express a common theology across the two genres. A conceptual model developed by Rowan Williams in his book The Edge of Words is used as a framework to demonstrate this claim. Finally, the study suggests that Robinson’s open approach to religious thought has the potential to appeal beyond the confines of Christian orthodoxy. In summary, by offering a unified approach to Robinson’s theology across both genres, the study seeks to provide an innovative perspective on her overall work