The aim of the article is to shed light on the particular relationship between religion and politics in the present day, based on the restitution of Habermas's contributions in this regard. To this end, we will first review the notion of 'linguistization of the sacred', with which the German philosopher ponders the place that religion occupies within the system of his Theory of Communicative Action. Secondly, we examine what function religion occupies for Habermas, in the context of a post-metaphysical era marked by the expiry of any discourse sustained on the basis of dogmas and absolute truths. In the third section, we reconstruct the way in which Habermas enables the introduction of religion into the public space, fundamentally within the framework of North American democracies. Finally, we place Habermas's arguments about the relationship between religion and politics in the broader context of the post-secondary debate. We conclude by recapitulating the arguments presented.