A man who was a salesman of dictionaries and encyclopedias was telling the woman, standing on her doorstep, “This is the latest encyclopedia. You and your children, all will be benefited by it.” But she said, “We have it already. You can see, there in the corner.”
The man looked in the corner. There was a book of the same thickness. He said, “That is not an encyclopedia, that is the HOLY BIBLE.” The woman could not believe it — from that far, how could he judge that the book was the HOLY BIBLE? She said, “That amazes me. You are certainly a man of knowledge. How could you manage to see that that is a HOLY BIBLE?” He said, “Anybody can conclude that, seeing the layer of dust that has gathered on the Bible.”