This poem has no profound meaning, but its main idea is the first sentence of two paragraphs: the poem of the earth will never die, and the poem of the earth will never stop. How to express these two sentences? The poet wrote about crickets in the Woods in midsummer and crickets by the fire in winter. The alternation of one hot and one cold represents the change of four seasons, and the vitality of nature will not disappear because of the high temperature of melting gold in summer and the cold of brittle iron in winter.