The source that modeled John Bunyan's writing style in The Pilgrim's Progress was a. the English Bible.
The Pilgrim's Progress (1678) is considered to be a Christian allegory. Besides being a writer, John Bunyan was also a Puritan preacher and that is why his works were all highly influenced by religion. In The Pilgrim's Progress all the characters of the story have names that are considerably significant, such as Christian, Evangelist and Goodwill. The Pilgrim's Progress, narrated by an omniscient narrator, tells the story of Christian's journey from his hometown, the "City of Destruction," to the "Celestial City", which represents Heaven. Furthermore, during his journey, Christian carries a book that is thought to be the Bible. Bunyan’s selection of words, the use of direct and indirect quotations from The Bible and the name of places such as the Palace Beautiful and the wall called Salvation also show the influence of the sacred text in the book. In addition, Bunyan resorts to a simple and colloquial but energetic language that has also been taken from the Bible.