Al-Amidi states that a Mujtahid should know the fundamentals of faith as set out in the creed, viz., that God exists with His attributes, that God is the Giver of Commands, that the Prophet was true in his mission and that this mission has reached us, although it is not necessary for the Mujtahid to go into the philosophic details of all these problems like an expert theologian. Further, the Mujtahid should know how to deduce laws from the bases of the Shari'ah and should be able to state and set out these deductions clearly.
Mara mwanadamu anapokuwa amejitoa kutoka katika shuruti yaani kushurutishwa kufuata mfumo au kitu chochote kile ambacho nafsi yake haipendi (hulka) hapo huwa amekatilia mbali minyororo ya utumwa na hatimae kutumia uwezo wake wa kuzaliwa na ule wa kujifunza basi muundo wake wa fahamu hupotea hii ni kutokana na ukweli kwamba kadiri mtu anapotumia sana sehemu ya kiungo cha mwili wake ndipo kiungo hicho kinavyoweza kuendelea akikiacha bila ya kutumia hudumaa