James Joyce said that his Dubliners was intended to report a kind of moral history of his colonized country. But the moral history was written by him as an artist, not as a historian or a philosopher. A writer tries to deal with matters of man and his life above all. That is why literature is not so analytic as philosophy and not so inclusive as history. Rather, it is descriptive and specific. It is not so much an answer or fact as a question or plausibility. Though trying to seek for some kind of truth about man and life as history and philosophy does, it uses the material of language and the text with structural beauty. In this sense, Dubliners is a moral history of Ireland as the writer`s own artistic creation. Joyce presents the three words of `paralysis,` `gnomon,` and `simony,` which play the role of variation of the theme and narrative structure of the whole story of "The Sisters." These three words help the reader to realize the inherent parts of life of the colonized people of Ireland. They serve as a key to the hidden psyche of the people of colonized country as well as to the linguistic structure of the text. As the word `paralysis` plays the reminding role together with the other two words, so the geometric word of `gnomon` does in "Grace." The four characters of Kernan, Power, Cunningham, and Father Purdon try to sustain and bestow grace in their own ways. `Grace` serves as a kind of means of the colonized people to retain and show off their dignity. But to the colonized, who are conscious of their inferiority, the original sense of the word is distorted into a superficial and material ones. In particular, the `grace` for them is nothing more than an imitation of the political and commercial values of imperial nations. This is a false belief that comes from the complex concerning their identity characteristic of colonized peoples. Joyce manages to weave an aesthetic organ of text by reminding, the reader in the course of the work`s plot, of the geometric word of `gnomon` which was designed as a kind of variational metaphor in "The Sisters." This represents the gnomonic nature of colonized countries that try to imitate imperialist countries like England. That kind of `grace` they try to sustain and bestow is a `gnomonic grace`, which is distorted and materialized. It is deprived of spiritual and mental qualities in spite of its apparent resemblance to imperialists`. This explains the moral history of the colonized Ireland incorporated into Joyce`s works of textual art.