This question examines students' ability to analyze the meaning of poetry. Misty poetry uses metaphor, suggestion and synaesthesia in art. The spiritual connotation of misty poetry has three levels: first, it exposes and criticizes the dark society; The second is to look for light in the dark, reflecting the sense of exploration and strong heroism; Third, based on humanitarianism's special concern for "people". So this obscure poem mainly uses metaphors. "Rose" means "achievement" and "thorn" means "setbacks on the road", which means "Although I haven't made remarkable achievements, you will hear my good news through unremitting efforts".