It means: Human beings cannot actually empathize with each other emotionally.

This sentence comes from "Little Miscellaneous Feelings", the last article of Lu Xun's "Ji Ji Ji": "A man downstairs is dying of illness, and the family in the next room is singing on the gramophone; opposite is the nanny. Upstairs there are The two laughed wildly; there was also the sound of playing cards. There was a woman crying for her dead mother on the river. Human joys and sorrows are not the same. I just think they are noisy."

The first half of the sentence is "human." "Sorrows and joys are not connected." It can be seen from the previous article that this is a comment on the objective situation, that is: everyone is addicted to his own life, and the joys and sorrows between people are independent and broken. The second half of the sentence "I just think they are noisy" puts myself into the situation. You can imagine an alley with old-style houses on both sides, and behind each window are people's own lives. One of them, a gentleman with an eight-point beard, was leaning over the table, frowning and writing something like, "I just think they are noisy."

From a reader's perspective, Mr. Lu Xun is by no means indifferent. Because he saw the sadness of strangers, and he saw the joy of strangers. The sorrows and joys of strangers, these junk messages that would be directly filtered out by others, left their mark in his eyes, mind, and heart and fell from his pen. From this point of view alone, Mr. Lu Xun cannot be said to be indifferent.

Extended information:

If a person wants to care about the plight of others, first of all, the person himself needs to have practical, at least basic, material security for life, and more. Important, a sound personality or a perfect mental state. A person who cannot eat enough himself and is unwilling to share his food should never be denounced as indifferent.

A person whose own spiritually poor life is often in a tangled state cannot be accused of being indifferent if he does not pay attention to and help the lives of others. A person can only give to others what he has in excess. Only in this way can the overall happiness of mankind be truly improved. If a person who is "self-defeating" is compassionate, this person will live a miserable life. However, the majority of people are "unable to live their own lives."