What is the story and moral of "casting pearls before swine"?

The implication of "casting pearls before swine": it is a waste of breath to talk to people who don't understand reason; It is also often used to laugh at people who talk without looking at objects. It is not advisable to talk without looking at the object, nor is it advisable to reason with fools.

Original story:

There is a piano playing expert named Gong. He played a piano song called "Clear Corner" for the cow, and the cow bowed its head and ate grass, as if it didn't hear anything. It's not that the cow didn't hear it, but this wonderful tune doesn't suit the cow's ears.

Gong changed his tune and played the buzz of a group of mosquitoes and the cry of a lonely calf. Hearing this, Niu Yi immediately shook his tail, pricked up his ears and walked back and forth in small steps because of anxiety.

Antonym: the right medicine

[Idiom explanation] Take medicine according to symptoms. Metaphor is to take effective measures to solve the problem of things.

[Allusions] Zhu Ziqing's How Mr. Wen Yiduo Walked the Road of China Literature: He may use this primitive collective strength to prescribe the right medicine for future generations' laxity and malaise.

[Synonym] Be targeted and adapt to local conditions.

[Antonym] Aimless and inappropriate behavior

[useful] useful

[emotional color] commendatory term

[Grammatical Usage] Used as a predicate, attribute or adverbial; Include praise

[Idiom structure] A little formal

[Date of birth] Modern