When John returns from his journey, he tells his father what he has seen and learned. John wants to tell everyone else, as well, but his father dissuades him. John's father explains why the knowledge should not be shared immediately:
Truth is a hard deer to hunt. If you eat too much truth at once, you may die of the truth. It was not idly that our fathers forbade the Dead Places.
John accepts the wisdom of his father's words:
He was right--it is better the truth should come little by little.
In the concluding paragraph of the story, we learn that John and his father began to lead their people slowly to the truth. "At least, we make a beginning," John says.