Der gold'ne Wegweiser: Ein Führer zu Glück und Wohlstand, published in Cleveland in 1881 and made available in English by Madison's Max Kade Institute in 1993:

Our native language, German, is one of the oldest, purest, and most cultivated of the living languages and surpasses most modern languages in richness and strength, in malleability and suppleness. It must therefore be especially important to our German compatriots in America that their descendants also learn not merely to understand their beautiful native language without difficulty, but to know it thoroughly and to speak it. . . in order to imbue the rising generation with love for a language in which people such as Lessing, Schiller, or Goethe wrote, one must open up to them the inexhaustible wellspring of beauty which this language contains and let them drink from it.

If the German generation born here only learns to speak and read German without becoming familiar with the magical profound spirit of the German language, then they will naturally only use it when they are forced to do so, or when they see their advantage in so doing. It is different if the German language has become a dear friend to them, which helps to beautify their leisure hours with the immortal monuments that German thinkers and poets have given to humanity.1

1 The Golden Signpost: A Guide to Happiness and Prosperity (Madison: Max Kade Institute for German-American Studies, University of Wisconsin-Madison. 1993) 337-8.