“Nothing is more powerful than an idea whose time has come.”
What Hugo published, in The History of a Crime, is: “An invasion of armies can be resisted; an invasion of ideas cannot be resisted.” The famous English form — an idea whose time has come — appears nowhere in the translated text and reshapes the sentence into something Hugo did not write. It hardened into its modern shape in twentieth-century English quotation books.
- — Victor Hugo, The History of a Crime — translated by T. H. Joyce and Arthur Locker (Project Gutenberg #10381) (1877)

