Fiqh (Jurisprudence)

Fiqh (فقه‎) is Islamic jurisprudence. Fiqh is often described as the human understanding of the sharia, that is human understanding of the divine Islamic law as revealed in the Quran and the teachings and practices of the Prophet Muhammad and his Ahl al-Bayt.

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Interesting question!

One has to assume that if the possessors of these books chose not to share them, then it is not necessary for us to know the contents. Mushaf Fatimah and al-Jafr, according to hadith, contain more than fiqh and shari'ah; for instance, according to hadith, they contain detailed future prophecies, and perhaps this information would not be beneficial for us. According to hadith, Mushaf Fatimah was narrated to her as a form of consolation due to her grief for her father, so from that angle, there may have been a personal purpose. 

There are a number of sacred items mentioned in hadith as being passed on from the prophets to the Imams as a sign of spiritual authority and these can be looked at in this light.

There is no indication that the Imams required these materials to learn, but that does not mean that there is any problem in their having them or consulting them. Perhaps it was reassuring to some people around them, who did not believe in the imamate, that they were referring to texts received from their forebears. 

We live in an era where the value of things is measured very materially, especially in the era of the Internet, when it is assumed that anything worthwhile should be shared publicly. However, this brings up the question of, do things have value if people do not see them? (For instance, a tree in a forest.) Is it possible for something to have purpose if it is seen by only one or a handful of people? It is reasonable to argue that there is a spiritual value to the existence of these items; however, for them to have an existential value, it is not necessary that they be available to the majority of people. 

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Liyakatali Takim, Professor Liyakat Takim is the Sharjah Chair in Global Islam at McMaster University in Canada. Answer imported 7 years ago

As far as sea food is concerned, only that fish which has scales may be consumed. In addition, it must be alive when caught from the water. Crabs are not classified as fish and may not be consumed. There is some differences amongst certain ulama' regarding lobsters but the general consensus seems to be that it should not be consumed. See Ayatullah Seestani's Islamic Laws p. 489.