SHAFAQNA- Sheikh Tusi, (d. 460 A.H.) introduced his mentor Sheikh al Mufid, in his al Fihrist thus: “Muhammad b. Muhammad b. al-No’man, al-Mufid, had the kunya Abu Abdillah, and was well known as Ibn-al-Muallim. He was among the Imamiyya theologians, and was its final authority in his time. And he was a jurist (Faqih) of the advanced