Believers burn incense and ask why, and they harm themselves. Hazy things hang between the walls, and ancient mirrors are re-ground with the moon. What do you mean?

This is an ancient riddle poem of China, which describes a guessing game of scenes and objects. The following is the explanation of each sentence:

1. Believers burn incense and ask why family members harm their families:

-"Believer" refers to a person who has a firm belief in religious beliefs and can be understood as a person who asks God for advice;

-"Burning incense" refers to burning incense at the time of praying to the gods or ancestors to show respect;

-"Asking things for a reason" means asking about the cause of things or predicting the future;

-"Family members hurt family members" refers to the situation in which contradictions and mutual injuries occur within the same nation or group.

So the meaning of this poem is: a man with firm belief lights a candle, asks the gods why this happened, and finds that people of the same nation or group are hurting each other.

2. Obscure objects are hung on the wall, and ancient mirrors are reground in the same month;

-"Something hanging dimly between the walls" refers to a vague thing hanging on the wall;

-"Re-grinding the ancient mirror and the bright moon" is to re-grind the ancient mirror and make it as bright as the moon.

So the meaning of this poem is: there is a vague object hanging on the wall, but after polishing, it becomes as bright as the moon, just like an ancient mirror that has been polished again.

Taken together, the answer to this poem may be: an ancient mirror. Because the first sentence describes a man asking the gods why, and the second sentence describes that the ancient mirror has become as bright as the moon after being honed, suggesting that this ancient mirror may be an important object that can reveal the truth or predict the future.