This study traced the historical situation of the times which Donghak from Gyeongsang Province has blossomed in Jeolla Province through the collection of Gasa written by Suun. Thus, he tried to explain his Gasa(歌辭), written in Jeolla Province after leaving his hometown because of the slander of the local people, what is called, a concept of diaspora. This is because the diaspora is a concept encompasses the state of a specific ethnic group or group leaving their original place and settling in other regions beyond the conceptual dimension that symbolizes the migration of Jews. This includes all articles dealing with the loss and grief of the diaspora found in those who have left their area, regardless of where they live. Suun’s writings, describing his longing for his hometown in a foreign country called Jeolla Province, also give a glimpse of the loss and sorrow of the diaspora. His Gasa was written in Korean verse for the purpose of being read by the Joseon people. All of the Gasa are rhymes tailored to humming as if they were reciting Sijo with two notes. There is a reason why I chose a Gasa that is easy to sing along and suitable for word of mouth. It was for the grand dream of propagating truth. As a result of analyzing “Song of Instruction”, “Poem on Spritual Training”, and “Song of Encouraging Learning” for this, a strong tone of command was used, unlike other Gasa written in his hometown. The command tone is for the authority and clarity necessary for propagating truth. Dignity as a person of absolute authority comes from the command tone. Only when they show messianic power can followers who have strengthened ties join their plans. In the end, the command tone of Suun was a strategic way to present a utopia. The propagating truth by Suun changed the people in Jeolla Province by embodying the Sicheonju ideology and achieving the creation of a new world. ‘The day when we sing a peaceful song in pleasant Spring days’, repeatedly appears in his Gasa, is a figurative, symbolic, and metaphorical expression of the thought in the beginning of the world. The 21 letters, incantations for reopening the new world, stand for ‘Serving/Bearing Hannullim, Making and Changing, Eternally Not Forgetting, Retaining the Ultimate Knowing, Ultimate Energy Here and Now, Praying for its Great Descent.’ The radical Donghak thought, all the people who worshiped the Sicheonju were equal, was like the salvation for the Joseon people marginalized from the social class. The Joseon people would have recited the same incantation as salvation like songs. This was the power of the Korean Gasa. It is also the power of the rhythm that is easy to hear and sing along. It is safe to see it as one of the many reasons why the Donghak thought in Suun, started from Gyeongsang Province, blossomed in Jeolla Province. As a result, the achievement of Suun, chose Jeolla Province in the diaspora situation, laid the foundation for the Donghak ideology to blossom.