This paper explores the debate on the public voice of religion from two perspectives: contemporary critical theory and the Catholic social tradition. Using the recent conversation between Jürgen Habermas and Joseph Ratzinger (Pope Benedict XVI) on religion and secularization as a point of entry, I argue that critical theory offers a framework of rationality that promotes dialogue between religious and secular individuals while the Catholic social tradition's principle of subsidiarity provides a practical model for how this dialogue can occur.