Paper Boat is selected from Tagore's famous poems. What theme does this poem express?

The poem "Paper Boat" is selected from Tagore's "Crescent Moon Collection". The works in this collection all describe a child's discovery and perception of the world and nature, and the childlike interest and innocence presented in it are poetic. The sentence 1~3 in this poem describes children's longing for distant places, communication and mysterious things. In the poem, "I" wrote "my name and the name of the village where I live" on a paper boat and threw it into a swift stream to let people in different places know who I am. This childish behavior shows children's unique psychological logic, and the author grasps this behavior of "I" and skillfully presents a small mind. Pay special attention to the word "every day" in the first sentence, indicating that this kind of behavior is not done occasionally, but often, from which we can see how deep the longing and yearning for "I" is. 4~6 sentences in the poem describe hope, and the author writes the innocent and lovely place of the little hero "I" through the yearning in children's innocent hearts. "I" carried Li Xiuhua in the garden onto the boat and watched them drift away slowly, hoping that the paper boat could bring them safely to the shore at night. This simple and impossible wish expresses my concern and treasure for these flowers. An equal living creature needs careful care. I hope it can come back safely. The four common words "peace and security" have a deeper meaning here, showing the little hero's special love for flowers and his unique way of caring. This idea of equality with biology is not only related to Tagore's thought, but also related to children's unique thinking logic. The poet described it delicately with a childlike innocence, which made us relive our childhood of communicating with everything. Then "I" looked up at the sky and saw the little clouds in the sky, which had a wonderful association: "I" regarded the little clouds in the sky as white sails floating in the wind, and the strangest thing was that "I" imagined that there were playmates in the sky to put them in the river to compete with my paper boat. This kind of imagination is beautiful and fantastic, which accords with children's curiosity, and makes the mysterious world in the sky close to the earth, while the world on the ground is in the sky, and the sky and the earth are brought closer at this moment. At this time, the sky, water and white clouds are intertwined, and "I" is intoxicated, which constitutes a beautiful and moving picture. This is a unique artistic realm and a space for readers' imagination to soar freely. The seventh to eighth sentences of the poem are about my dream. At this time, Xiaojie had fallen asleep, his face buried in his arm, but he saw the paper boat again in his sleep. This dreamy paper boat floats slowly under the midnight starlight, while the sleeping fairy sits on my paper boat with a basket full of dreams in her hand. Here we see the dream in the dream, and the poet turned a turning point here. The dream in this dream is in a basket and left with the sleeping fairy in a paper boat. Where are they going? "I" didn't say it, nor did the poet point it out, but what matters may not be where I am going, but the vision of where I am going. This is a child's fantasy, which symbolizes his little soul's desire for growth and his curiosity and yearning for the distant world. The whole poem ends here, expressing the author's silent blessing to this young and innocent heart. The whole poem creates an innocent child image for us and expresses the theme of love and beauty that the author has been paying attention to. This pure expression of childlike innocence can awaken the warmth in readers' hearts. An image that runs through this poem is a paper boat. The whole poem begins with putting a paper boat, ends with seeing a paper boat in a dream, and there are scenes and associations when putting a paper boat in the middle. The paper boat here is not only a little sustenance for the little hero, but also a metaphor for the media leading to the outside world and the future. It is in the connection with the paper boat that the little hero shows his curiosity and innocence. The whole poem is natural, simple and beautiful, with the style of pastoral poetry. This can also be realized from some images used in the poem, such as streams, villages, gardens, beautiful flowers and so on. These images, natural or close to nature, create a simple and pure atmosphere for the whole poem. They are combined with the naive little hero and the naive behavior of the paper boat, which harmoniously highlights the theme. The form of this poem is not metrical, but prose, which makes this poem more free in expression, but not lacking in poetry. In fact, in every sentence, there is an inherent rhythm and rhythm between sentences, which naturally blends with the images and themes to be expressed, making this well-known poem.