The Fox and the Crocodile
A fox passes by the river near woods. A big crocodile pokes head out of water. Both argue about their noble families.
Crocodile proudly boasts about his ancestors. "My grandfathers were kings of river!", says. The fox listens to this empty boasting.
The fox smiles and replies to crocodile. "Studied lesson well, but look at skin.", says. "Your skin looks rough like a log."
Crocodile dives to river bottom in shame. He who boasts with empty words is disgraced.
A person's work is their mirror, not words.