Henry Durbanville, a Scottish pastor from another era, tells the story of an elderly woman in his parish who lived in a remote part of Scotland. She longed to see the city of Edinburgh, but she was afraid to take the journey because of the long, dark tunnel through which the train had to pass to get there.

One day, however, circumstances compelled her to go to Edinburgh, and as the train sped toward the city, her agitation increased. But before the train reached the tunnel, the woman, worn out with worry, fell fast asleep. When she awoke she had already…