In this paper, Huj. Ali Naghi Zabihzadeh studies the personality and role a great Shi‘a jurisprudents and scholar of hadith who led the community during the Age of Minor Occultation (260 -329 A.H) i.e. Muhammad ibn Ya‘qūb Kulayni. This paper is based on the second chapter of Marja‘iyyat wa Siyāsat, vol. 1, published in Qum in 2005 by the Imam Khomeini Education & Research Institute. This paper is translated from Farsi into English for the Message of Thaqalayn by Hamideh Farajian.