Supplement:
From the deeper symbolic meaning of poetry. Because symbolic literature focuses on containing a certain meaning, thus embodying suggestibility. In this poem. The image of a girl is actually the poet's ideal. His wandering search is to find the girl-now, the girl appears, but her footsteps, her color, together with her sigh and melancholy, all have unattainable symbolic significance-persistent pursuit can not be grasped. The girl like lilac that the poet expects is so noble, with idealized color, beautiful soul and charming appearance. But girls like that are hard to find. So, in the face of idealistic expectations. "I" is always confused, with a sense of temperament tragedy, which runs through the whole poem, through the rendering of long and lonely rain lanes, decaying fences, cold complaints and drizzle, the superposition of lilac-like girl images, and the vagrants' illusory expectations for girls. Everything is not clear, not clear, but we understand and feel it. This is a feature of symbolic literature-suggestibility. The function of this kind of literary image is to inspire people to appreciate and understand deeper meaning through the surface of the image.