The argument of this article is that the recent writing of Jurgen Habermas concerning the boundary of public reason offers the following advantages over the classic "liberal proviso": (1) It releases religious citizens from an undue cognitive burden; (2) It distributes the cognitive burden of justification symmetrically across the citizenry; and (3) It offers a multidimensional concept of reason that becomes self-critically aware of its boundaries. (Contains 6 footnotes.)