The moral of casting pearls before swine is that everything should be done according to the object, and we should learn to suit people and things.

story: a long time ago, there was a great musician named Gong Mingyi. Once, when he saw a cow eating grass, he played an abstruse "angle-clearing exercise" for the cow. But the cow ignored it and just ate grass. Gong Mingyi carefully observed it and found that Niu didn't hear the piano music, but didn't understand it at all, so he didn't respond.

After making this clear, Gong Mingyi played a new tune, which sounded like mosquitoes, cattle flies and calves calling. When the cow heard this piece of music, she stopped at once, wagging her head and ears to listen carefully. This idiom is used to illustrate: to do anything, we must look at the object, suit the person and suit the situation. Later generations used the idiom "Play the lute to a cow" to describe the futility of telling profound truth to an unreasonable layman.

Play the lute to a cow.

1. You can play the lute to a cow by telling him these profound theoretical knowledge.

2. Even if you say these things seriously, you are casting pearls before swine, because he has no mind to listen to them at all.

3. No matter how hard I tried to dissuade her, it was casting pearls before swine. It seems that she really made up her mind.

4. Aren't you casting pearls before swine when you say this to a dog who doesn't understand human speech?

5. The teacher talked endlessly above, and we fell asleep below, which was like casting pearls before swine.

6. Don't show such profound art in front of us. It's pure casting pearls before swine.

7. It is pure casting pearls before swine for a person who doesn't know classical music to spend hours listening to such a concert.

8. Although you are working hard on your performance, I have to tell you that you are casting pearls before swine.

9. To say this to someone who has already changed his mind is like casting pearls before swine.

1. Although this is from your heart, it seems to me that it is casting pearls before swine.