The last sentence: "The years have changed, the world has changed, and everything is not as beautiful as I imagined."
Analysis: this sentence emphasizes the passage of time and the change of things, implying the author's dissatisfaction and disappointment with reality. "Time change" refers to the irreversibility and continuous passage of time, while "material change" emphasizes the variability of things in life. The unsatisfactory and unsatisfactory results of this change are frustrating. The last sentence indicates the turning point of the theme and creates an emotional tone of disappointment, pain and fantasy about the world for the poem "Seeing through the world of mortals breaks my heart".
In a word, The Sad Sutra for Seeing through the Worlds of Red is a poem expressing dissatisfaction with reality. The last sentence can guide and set off this sad mood by emphasizing the disappointment brought by the passage of time and the change of things. This combination of sentence patterns is often used in poetry to express the contradiction, confusion and anguish of life.