The Holy Quran and the Hadith are the base and the primary sources of Islamic law. They contain the answers to all questions that human beings may face in their whole life up until the end of the world. Even though, the Holy Quran is simple, it contains many things which cannot be understood; not only by common people but even by experts of language. Mere expertise over language does not give one mastery over law and legal implications and nuances. Life is ever-changing and as such the rules governing it also change with the times. There are many things which are not explicitly mentioned in the Holy Quran and Hadith, but which are necessary today, for e.g. share business, fixed deposits, Islamic rules about insurance and other such rules. In these and such issues, we have to use the guidelines laid down by the Mujtahidin (the jurists). Those guidelines have been laid down in the light of what the Holy Quran and Hadith say and what they demand.
Nowadays, the enemies of Islam are raising many objections about Islam. It is our duty to combine all our forces and answer to them and not that we fight among themselves.
Imam A’adham is a great Muhaddith (Hadith-Expert). The narrations of his students are present in Sihah Sittah (The 6 most authentic books in Hadith) like Sahih Bukhari, Sahih Muslim, Jame’ Tirmidhi and others.
When the beginning verses of Surah Juma’a was revealed:
It is He Who has sent amongst the Unlettered a messenger from among themselves, to rehearse to them His Signs, to sanctify them, and to instruct them in Scripture and Wisdom― although they had been, before, in manifest error― (2) As well as (to confer all these benefits upon) others of them, who have not already joined them: and He is Exalted in Might, Wise. Surah Juma’a (62:2,3)
Hadhrat Abu Hurairah (May Allah be well pleased with him) asked the Holy Prophet (Sallallahu alaihi wa sallam): O Prophet of Allah (Sallallahu alaihi wa sallam)! Who are the ones who will come after and you will recite the verses of the Holy Quran to them and purify them? The Holy Prophet (Sallallahu alaihi wa sallam) did not answer and held His peace. The question was repeated thrice. Hadhrat Abu Hurairah (May Allah be well pleased with him) says: At that time, Hadhrat Salman Farsi (May Allah be well pleased with him) was present with us. The Holy Prophet (Sallallahu alaihi wa sallam) kept His hand on Hadhrat Salman Farsi (May Allah be well pleased with him) and said: If Iman is as fat as the planet Venus, then some people among them (i.e. the people of Hadhrat Salman Farsi), why some, only one person will get it from even there.