Quranic parallels—constituting a network of verbal and semantic connections between verses—serve as a cornerstone of intra-textual exegesis (interpreting the Quran through the Quran); in *Tafsir al-Mizan*, they play a pivotal role in systematically comprehending the meanings of revelation. Transcending mere superficial resemblances, these parallels act as a tool for uncovering the Quran's internal coherence and resolving semantic ambiguities. Employing a descriptive-analytical method and focusing on Surah Al-Mu’minun, this study examines Allameh Tabataba'i’s approach to utilizing Quranic parallels. In doing so, the parallels are identified and analyzed at both verbal and semantic levels. The primary objective is to identify and classify the functions of these parallels in *Tafsir al-Mizan* and to elucidate their role in facilitating a shift from a fragmented understanding to a systemic one. The findings indicate that Allameh Tabataba'i employs parallels to refine the implications of terms, resolve fundamental issues, and delineate a coherent system of monotheistic and eschatological beliefs. Furthermore, the study reveals that the application of parallels in Surah Al-Mu’minun—beyond elucidating ontological truths—shapes an educational framework emphasizing sincerity and accountability; within this framework, verses concerning the Origin, the Hereafter, and practical conduct are interconnected through meaningful structural and guiding links. Thus, in Allameh’s approach, Quranic parallels serve a foundational function in uncovering the Surah’s "semantic system," organizing doctrinal and ethical propositions into an interconnected and purposeful structure.