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. The major theme in John Bunyan’s The Pilgrim’s Progress is the cost of salvation. As Christian’s journey proves, the road to Heaven is not easy, the cost is great, and the true Christian must be willing to pay the cost no matter what. Man is full of sin, but this does not keep him from attaining glory.