Jürgen Habermas’ assessment of the rationality of religious convictions is ambivalent, as it oscillates between a postsecular appropriation of their semantic potentials and a fideistic insistence on their “discursive extraterritoriality.” In this article, I argue that Habermas’ fideistic portrayal of religious convictions is neither compatible with the overall argumentative architecture of his postsecular paradigm nor a logical consequence of Habermas’ philosophical framework in general. Instead, once his fideism is overcome, Habermas’ postmetaphysical discourse theory provides valuable resources for contemporary Catholic theology. This article thus offers both a theological assessment of Habermas’ view of religious belief and an argument for a Catholic appropriation of Habermas’ postmetaphysical thinking.