What rhetorical devices did Guo Moruo use to talk about their functions in expression?

There are four verses in the poem "Tiangou". The first section takes "swallowing" as the key word, showing the life characteristics of a "Tiangou" absorbing everything in the world. Look at this dog. It devoured the sun, the moon, all the planets and even the whole universe. Swallowing all this, it finally became itself, "I am me." Who is this "Tiangou"? Actually, it's Guo Moruo himself. He feasted on the world's outstanding ideological and cultural treasures in Japan and swallowed Goethe, Nietzsche, Copernicus Darwin and Spinoza. He formed a modern man with rich thoughts and strong subjective consciousness. This "Tiangou" is not only Guo Moruo, but also includes all Chinese sons and daughters who seek the truth of saving the nation and modern knowledge and culture in China's modern history. He is Liang Qichao, Wang Guowei, Lu Xun, Zhou Zuoren, Hu Shi, Xu Zhimo and Wen Yiduo ... Isn't this group of "Tiangou" creating modern ideology and culture together? In the second paragraph of the poem, "Tiangou" swallowed up the whole universe and began to show its energy to the world. After devouring the universe and the planet, it radiates brilliant light, which is not only macroscopic light: "the light of the sun", "the light of the moon" and "the light of the planet"; It is also microscopic light: "X-ray". In a word, it represents the light of all things, and it is the sum of the energy of the whole universe. If the first section of this poem is about the storage of energy, then the second section is about the flash of vitality; The first section focuses on dynamic description, and the second section is static photos. Storage and flash memory, dynamic and static, weave a huge image with broad mind and unlimited creativity. The third section is the most wonderful part of this poem. The "Tiangou" who absorbs the essence of the sun and the moon and accumulates the energy of the whole universe, at this time, the subject consciousness is lush and needs to surge and erupt to show its vitality and creativity to the fullest. So he is like electricity, like the sea, like fire, running wildly, roaring and burning. Here, the poet wrote a lyric hero image with distinct subjective consciousness. This lyric hero is just a "phoenix" after nirvana. With the extraordinary power of "constantly destroying, constantly creating and constantly striving" (Guo Moruo's Standing on the Earth), it shows the world the exuberant youthful passion and strong creative desire of modern youth and modern intellectuals. This passion and desire is so strong. The experience and feelings of modernity filled the lyric subject's heart, which made him completely forget the objective existence of the external world, but only felt that he was lonely and extremely powerful, and only a capitalized "I" was reflected on the display screen of the whole universe. Tengu, trapped in irrationality, regards this capitalized "I" as the only goal of destruction and transcendence. It peels my skin, eats my flesh, sucks blood, gnaws my liver, and finally even revels in my thinking world, releasing endless vitality and passion, showing the free spirit of fully developing and publicizing my personality. After crazy galloping, roaring and burning, the "Tiangou" is back. In calm, it cried in surprise: "I am me!" " Although this magical tengu is full of infinite creativity, it has not found a suitable place to release it. It objectifies itself as a temporary vent object, but it can't fully display its personal talents. Guo Moruo, a poet like "Tiangou", is still wandering in a foreign country. He can't return to his hometown in time to serve the country faithfully, and he can't apply what he has learned to the construction of the motherland. Guo Moruo, as a poet, and Tian Gou, as a lyric hero, are integrated here. Both of them feel that their blood is gushing, which is difficult to control and may "explode" at any time. The last section responds to the first section of the poem, ending with the poem "My I'm about to explode", which makes the whole poem full of tension and adds rich meanings.