The language of the common good, like the language of property which exemplifies it, is Janus-faced. Looking back it points to a concrete givenness of community, a present and existing form within which we have been given to communicate with others, and which we cannot ignore without great blame. Looking forward, it can invite us to think of a City of God, a sphere of universal community, and encourage us to seek intimations of it from the future. But only so far can it take us. It cannot ease us through the portals of the City of God up the steps of a ladder of dialectical reconciliations.