In writing and teaching the principles of ijtihad, he became known as “Muhaqqiq Qummi” (“The Researcher of Qum). The book Al- Qawanin al-Muhkamah fi ‘Ilmil-Usul is one of his most renowned works; until recent years it was still being taught in the seminaries. Due to his great efforts in launching an usul-oriented movement, he is known as the reviver of the science of usul.
Ahli Sunna wanamwita khatimil Aarifiin,Sayyidil Muhaddithiin,sanadil Mutakallimiin,Hujjatulahi ala-Aalamiin anaelezea kwa marefu mno katika tasnif yake Fadhlul Mubiin juu ya Imam wa zama na kuwapo kwake na pia amekuwa mwenye kuamini juu ya Uimamu.Hivyo anaandika kwa kunakili Hadith moja: