"One person, one city, a lifetime of heartache" seems to be incompatible with the previous sentence, and they will never find a point of convergence. Therefore, it can be seen that it should be the literary youth who are self-righteous. So I guess secretly, read the whole sentence and infer boldly that the author of this sentence should want to express such a meaning, that is, "life is gathering and parting, laughing and laughing." Like a rolling river rushing away. When a person is in a city, he will face leaving those people or things I love, whether it is homesickness or separated love, which makes the author feel heartache. What's more, this kind of parting will make him leave someone or something forever, so write down words to express his sadness. "