The Pilgrim's Progress - Chapter 15 (The Delightful Mountains)

Christian and Hopeful arrive at the Delightful Mountains, a place of refreshment and teaching. Christian asks the shepherds there some questions and receives cryptic answers. In turn, the shepherds have some questions for the pilgrims and then offer them some hospitality. The next morning the shepherds show them Hill Error, Hill Caution, and the by-way to hell and also let them look through their perspective lens. They then send the pilgrims on their way with a map and some helpful advice.