Analyzing religious texts as artistic expressions of verbal communication is a vital aspect of contemporary scholarship. Scholars increasingly utilize interdisciplinary methods—drawing from literary criticism, linguistics, and semantics—to achieve deeper and more accurate interpretations of sacred discourse. Linguistic approaches, particularly in the study of religious texts, provide tools for examining structural and semantic elements scientifically, clarifying meanings and relationships embedded within. Roman Jakobson’s communication theory, with its detailed categorization of language functions, offers a powerful framework for such analysis. This study adopts a descriptive-analytical method based on Jakobson’s model to explore the balance and interaction of language functions in the Tawḥīd sermon of Imam al-Riḍā (A), which focuses on the oneness of God and His attributes. By emphasizing communicative roles of language, the research aims to enhance clarity and accessibility of monotheistic concepts for the audience. The findings reveal that the six language functions—emotive, referential, conative, poetic, phatic, and metalingual—work in harmony to deepen the connection between theological ideas and the listener. The emotive function conveys spiritual intensity and reverence; the referential function presents descriptions of divine attributes; the conative function directly engages the audience; the poetic function enriches aesthetic and rhetorical quality of the sermon; the phatic function maintains communicative flow; and the metalingual function clarifies theological terminology. This functional equilibrium transforms the sermon into an effective medium for transmitting monotheistic truths and facilitates a more profound engagement with divine concepts. Ultimately, the study proposes a linguistic model for analyzing religious texts, offering a structured approach to enrich understanding of monotheistic principles and providing a replicable framework for future research in religious linguistics. By bridging linguistic theory with theological content, this research contributes to a more nuanced comprehension of sacred texts and supports development of interpretive strategies that resonate with diverse audiences.