Semantics is a new approach in the field of linguistics dealing with the explanation of words; As one of the most important sciences, it has a significant application in the field of Quranic studies and holy texts. In other words, with the help of semantics, the exact meaning of a word and the meanings in the mind of speakers are clarified. Accordingly, the revision and determination of the position of each element and content in the holy texts depends on the study of that word with its syntagmatic and paradigmatic words in a systematic system and other words of the same order. The two words "poor" and "rich" are among the conceptual and key words of Nahj al-Balagheh that have been highlighted in various forms in this holy book. The present study has analyzed the meaning of words "poor" and "rich" in a descriptive-analytical method from a lexical point of view. Relying on Izutsu semantics in an axis of syntagmatic and paradigmatic of words, the results showed that these two words, with their nominal and verbal functions in the text of Nahj al-Balagheh, are expressed in positive and negative concepts, and most obviously, the opposition of these two words conveys an important message in the axis of syntagmatic. Accordingly, these two words, in addition to the general meaning that most lexicographers and commentators have provided, have developed semantic meaning in the prolific words of Imam Ali (AS); In other words, in addition to the material meaning of need and needless, they have also taken on a spiritual aspect. Also, these two words have become a criterion for measuring a person's human dignity.