It means as long as you can see the past, you can go to the future. The Mirror of History is a volume in a series of humanistic classics. There are about 30 articles in the book, all about major social movements and political events since the 20th century, including Trotsky's October Revolution, Gide's return from his visit to the Soviet Union, Zweig's Hitler's New Order, Khrushchev's The Death of Stalin, Nixon's Watergate Incident and Linton Miller's. The editor's unique perspective is also reflected in the choice of items.