The Fox and the Monkey (Greek Folk Tale)

A Fox and a Monkey were on the road together, and fell into a dispute as to which of the two was the better born. They kept it up for some time, till they came to a place where the road passed through a cemetery full of monuments, when the Monkey stopped and looked about him and gave a great sigh. “Why do you sigh?” said the Fox. The Monkey pointed to the tombs and replied, “All the monuments that you see here were put up in honour of my forefathers, who in their day were eminent men.” The Fox was speechless for a moment, but quickly recovering he said, “Oh! don”t stop at any lie, sir; you”re quite safe: I'm sure none of your ancestors will rise up and expose you.”

Boasters brag most when they cannot be detected.