The Quack Frog
Once upon a time a Frog came forth from his home in the marshes
and proclaimed to all the world that he was a learned physician,
skilled in drugs and able to cure all diseases. Among the crowd was
a Fox, who called out, "You a doctor! Why, how can you set up to
heal others when you cannot even cure your own lame legs and
blotched and wrinkled skin?"
— Physician, heal thyself.