The Pilgrim's Progress from This World, to That Which Is to Come is a 1678 Christian allegory written by John Bunyan. It is regarded as one of the most significant works of theological fiction in English literature and a progenitor of the narrative aspect of Christian media. It has been translated into more than 200 languages and has never been out of print. It appeared in Dutch in 1681, in German in 1703 and in Swedish in 1727. The first North American edition was issued in 1681. It has also been cited as the first novel written in English. According to literary editor Robert McCrum, "there's no book in English, apart from the Bible, to equal Bunyan's masterpiece for the range of its readership, or its influence on writers as diverse as William Hogarth, C. S. Lewis, Nathaniel Hawthorne, Herman Melville, Charles Dickens, Louisa May Alcott, George Bernard Shaw, William Thackeray, Charlotte Bronte, Mark Twain, John Steinbeck and Enid Blyton." The words on which the hymn "To be a Pilgrim" is based come from the novel.

As a literary device or artistic form, an allegory is a narrative or visual representation in which a character, place, or event can be interpreted to represent a meaning with moral or political significance. Authors have used allegory throughout history in all forms of art to illustrate or convey complex ideas and concepts in ways that are comprehensible or striking to its viewers, readers, or listeners.