Sheikh Mufid, a highly distinguished theologian and jurist, was the founder of developing the tradition in the fields of theology (kalam) and legal studies (fiqh). His role included establishing an independent identity of the school of Ahlul-Bayt, created a model for the development of Shi‘i fiqh, and formulated a method in theology and legal studies based on logical coherence between reason and revelation. This paper offers an explanation of Sheikh Mufid’s efforts to revive the principles of fiqh and kalam, a brief history of the political situation during his time, and his status with prominent scholars and the Ahlul-Bayt.