In Mo Yan's work, If Only You Could Understand Me, this sentence expressed a deep feeling of loneliness and helplessness. The author used the phrase "you can never see" to imply the loneliness and solitude in people's hearts, even if they look calm on the surface. This sentence could also be understood as fear of the unknown and worry about self-isolation. People are afraid of things they don't understand because they don't know how to deal with them. At the same time, they may feel isolated and afraid to communicate with others because they are unwilling to face their own feelings and thoughts. In the novel, this sentence also reflected the author's disgust towards the differences and misunderstandings between humans. He believed that people should understand and respect each other instead of suspecting and misunderstanding each other. Therefore, this sentence expressed a deep reflection and criticism of human society.