Ralph Waldo Emerson, Robert Ernest Spiller, Alfred Riggs Ferguson, Joseph Slater, Jean Ferguson Carr (1971). “The Collected Works of Ralph Waldo Emerson”, p.315, Harvard University Press
George Whitefield (1812). “Seventy-five Sermons on Various Important Subjects: In this Complete Collection is Included the Eighteen Sermons Taken in Short Hand by Mr. Gurney. And to which is Now Added, a Sermon of the Character, Preaching, &c. of the Rev. Mr. Whitefield”, p.412