We need the literature in which the ideas of our church have for centuries been expressed. Language is the medium of ideas. The thirty denominations that constitute the bulk of Protestantism in this country derive the spirit of their church life for the most part from non-Lutheran sources through the medium of English literature. This is as it should be. But when Lutherans no longer understand the language of their fathers or the literature in which the ideas of their confession have found their fullest expression, they lose an indispensable condition of intellectual and spiritual growth. They can never understand as they should the spirit of the church to which they belong. They are doomed sooner or later to share the fate of the Lutherans of New York of the eighteenth century. When we have forgotten our German we shall be out of touch with the Lutherans who come to us from the Fatherland. For the time being the World War has put an end to German immigration, but this will not last forever. Some time certainly immigration will be resumed, and as in former periods will be an unfailing source of supply for the Lutheran churches of New York. In the nineteenth century the "Americanized" Lutherans did not understand the Germans who came over in such overwhelming numbers, and were unprepared to shepherd them in Lutheran folds. The work had to be done by immigrant pastors who, on their part, did not understand the American life well enough to accomplish the best results. For the sake of the Lutherans who come to us from foreign lands we cannot afford to lose touch with the historical languages of their churches. At the beginning of the nineteenth century the use of German had sunk almost to zero. The minutes of the German Society had to be written in English because no one was sufficiently versed in German to write them in this language. There was nothing to interfere with the supremacy of English. Yet the English Lutheran church was unable to "propagate the faith of the fathers in the language of the children." Down to the beginning of the twentieth century, the English churches were dependent for their growth upon accessions from the German and Scandinavian churches. They were unable to retain even the families they had inherited from their Dutch and German ancestors. We search in vain for descendants of the New York Lutherans of the eighteenth century in any of our churches. Not until a new contribution of immigrants from Lutheran lands had been made to America did our church begin to rise to a position of influence.