The revolutionary system in the epistemology of religious knowledge is an expression of the legislative order as an extension of the ontological order. The central question of this study is: How can the theory of the Revolutionary System of Imam Shahid be explained and elucidated on the basis of Mulla Sadra’s theory of extensive substantial motion? Accordingly, the main proposition of the study is that “if the revolutionary system can be explained on the basis of the theoretical principles of extensive substantial motion, then the theory of Imam Shahid’s Revolutionary System can, in turn, be elucidated within the framework of Mulla Sadra’s theory of extensive substantial motion.” This qualitative study employs a documentary research method and draws on the philosophical system of Transcendent Philosophy (al-Hikmah al-Muta‘aliyah) of the School of Mulla Sadra to explain the substantial motion of the revolutionary system as an extensive and intensifying movement—from revolution toward the New Islamic Civilization. In other words, extensive substantial motion within the revolutionary system, manifested through the leadership of the two Imams of the Revolution (the wilayat al-faqih, or guardianship of the Islamic jurist, grounded in the logic and principles of the Imamate), can be extended and elucidated as a continuation of the divine system of mission, from prophethood to the Imamate and wilayah, and ultimately toward the hayat tayyibah (good and wholesome life) of the New Islamic Civilization. The findings indicate that the theory of the Revolutionary System and its foundational concepts can be explained through extensive substantial motion. This movement is rooted in Islamic foundations and, in continuity with the principles of religion, can be understood particularly through the principle of the Imamate as an extension of prophethood. The present article demonstrates that the theory of the “Revolutionary System” in the thought of Imam Shahid is not merely a political-social structure; rather, it possesses a dynamic ontological reality that is inherently consonant with the deepest layers of Mulla Sadra’s Transcendent Philosophy, particularly the principle of substantial motion. Accordingly, the theoretical principles of Mulla Sadra’s theory of substantial motion are employed to elucidate the theory of Imam Shahid’s Revolutionary System.