In "By the Waters of Babylon," when John returns, what do he and his father do with the knowledge he has acquired about the Place of the Gods?

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.