
“We believe that out of the public school grows the greatness of a nation.”
Address at a meeting of the Berkeley Lyceum, New York, November 23, 1900. Quoted in Mark Twain's Speeches (1910), ed. William Dean Howells, p. 146 http://books.google.com/books?id=7etXZ5Q17ngC&pg=PA146 (The speech is titled "Public Education Association" in that book, but also referred to elsewhere as his "I am a Boxer" speech.)