In literature, an epigraph is a phrase, quotation, or poem that is set at the beginning of a document, monograph or section thereof. The epigraph may serve as a preface to the work; as a summary; as a counter-example; or as a link from the work to a wider literary canon, with the purpose of either inviting comparison or enlisting a conventional context. A book may have an overall epigraphy that is part of the front matter, or one for each chapter. As the epigraph to The Sum of All Fears, Tom Clancy quotes Winston Churchill in the context of thermonuclear war:Why, you may take the most gallant sailor, the most intrepid airman or the most audacious soldier, put them at a table together – what do you get? The sum of their fears. Sir Walter Scott frequently used epigraphs in his historical novels, including throughout his Waverley novels. The long quotation from Dante's Inferno that prefaces T. S. Eliot's "The Love Song of J. Alfred Prufrock" is part of a speech by one of the damned in Dante's Hell. The epigraph to E. L. Doctorow's Ragtime quotes Scott Joplin's instructions to those who play his music, "Do not play this piece fast. It is never right to play ragtime fast." The epigraph to Fyodor Dostoyevsky's The Brothers Karamazov is John 12:24: "Verily, verily, I say unto you, except a corn of wheat fall into the ground and die, it abideth alone: but if it die, it bringeth forth much fruit." The epigraph to Eliot's Gerontion is a quotation from Shakespeare's Measure for Measure. Eliot's "The Hollow Men" uses the line "Mistah Kurtz, he dead" from Joseph Conrad's Heart of Darkness as one of its two epigraphs. As an epigraph to The Sun Also Rises, Ernest Hemingway quotes Gertrude Stein, "You are all a lost generation." The epigraph to Theodore Herzl's Altneuland is "If you will it, it is no dream..." which became a slogan of the Zionist movement. Louis Antoine de Saint-Just's line "Nobody can rule guiltlessly" appears before chapter one in Arthur Koestler's 1940 anti-totalitarian novel Darkness at Noon.