There once was a woman who lived in an isolated area and ordered her clothes through a store catalogue. One time she sent in an order for a hat for Henry. The person filling the order had no idea who Henry was and had nothing to go on. She decided to take a chance and sent the woman a generic man's hat.
The hat was returned with a note: You know this won't fit Henry.
I've always loved the faith of that woman. I never knew if Henry got his hat...but it is a wonderful explanation of the relationship between the writer and the reader. The writer is always looking for the the hat to fit Henry.