A horse’s power can be seen through a long journey, and a person’s heart can be seen through time. The meaning of the sentence "The strong wind knows the strong grass, the fierce fire knows the true gold" means:

It means that only when the journey is far away can you know the strength of the horse; only after you have experienced many things and a long time can you know the strength of the horse. The good and evil of people's hearts. Only after a severe test can one see the true nature of things, just as one can know the tenacity of grass after a strong wind, and the texture of gold can only be known after a fiery purgatory.

"A long journey can tell the strength of a horse, and time can tell a person's heart." This sentence comes from the twelfth section of "Zengguang Selected Works".

"The strong wind knows the strong grass" comes from the first and second sentences of the ancient poem "Gift to Xiao Yu" by Li Shimin, Emperor Taizong of the Tang Dynasty. The full poem is as follows:

The strong wind knows the strong grass, and the board swings Know the sincere minister. A brave man knows justice, and a wise man must be benevolent.

Extended information:

1. Horsepower can be seen from a distance, and people's hearts can be seen over time. Synonyms: success comes naturally.

2. English: Distancetestsahorse'sstamina. Story

During the Song Dynasty, Lu Yao was a gentleman in Nanjing. He was extremely wealthy, generous, and willing to do good. Ma Ma was the nephew of Mahan, who served under Bao Zheng, the governor of Kaifeng. He was a poor scholar at the time.

I originally took the opportunity to take refuge with my uncle Mahan, but when I arrived in Nanjing, I ran out of money and fell seriously ill and was trapped in an inn. Hearing that Lu Yao was willing to help others, he went to ask for help. After arriving at Lu Mansion, Lu Yao did not explain his relationship with Ma Han to Lu, but Lu Yao warmly received him, asked for medical treatment for him, and also vacated the house for Ma Li to study.

Lu Yao appreciated Ma Li's talent and knowledge, and the two became sworn brothers. After Ma Li recovered from his illness, Lu Yao gave him two hundred taels of silver to help him go to Tokyo (today's Kaifeng) to take the exam, and Ma Li passed the exam. Since then, Luma has also lost contact.

Many years later, a fire broke out in Lu Yao’s home, leaving his family in ruins and unable to make a living. He left his wife behind and went to Kaifeng to join his adopted brother Ma Li, begging all the way to Kaifeng. Unexpectedly, after arriving at Ma Mansion, Ma Li was not at home, and his family did not receive Lu Yao. Lu Yao thought Ma Li didn't miss his old feelings and walked away angrily.

After Ma Li returned home and listened to his family, he realized that his benefactor had been here. While scolding his family for being rude, he sent his servant Rijiu to chase Lu Yao on horseback. Rijiu catches up with Lu Yao and explains the whole story, and the two resolve their misunderstanding. Hou Ma Li took Lu Yao's family to Kaifeng. So there is an allusion that "the road is far away and the horse power is known, and the time is long and the people's heart is known".

Reference materials: Baidu Encyclopedia - Lu Yao knows the horse power

Reference materials: Baidu Encyclopedia - Lu Yao knows the horse power, and it takes time to see people's hearts