Aesop Fable - The Cat and The Birds (初級)
A Cat, heard that the Birds were ill. He dressed up as a doctor to visit them.
He knocked at the door of the Birds' house and said, "I am a doctor and coming to see if you are well".
They replied, "We are all very well and shall continue to be so. You can go away and leave us alone".
Moral: Know your enemies.