Part I tells of "Christian" and his journey to "Celestial City;"
Part II tells of the journey of Christian's wife Christiana and their children to Celestial City.
The two parts work together as a unified whole, which describes and depicts the believer's life and struggles. Indeed, given the easy style of the book, readers of all ages can understand the spiritual significance of the depictions in the story. However, Pilgrim's Progress does not simply instruct readers with spiritual allegories; it entertains them as well, through Bunyan's creative story telling. Enjoyable and spiritually instructive.