The Our' an says: ".

The Our' an says: "...and We have sent down the Book (the Qur'an) which makes clear everything and a guidance and a mercy and glad tidings to Muslims (those who submit to Allah)." Holy Our'an (16:89) "Surely We have sent down to you the Book with the truth to judge between mankind by what Allah has shown you..." Holy Our'an (4:105) Thus the Qur'an, with its broad concepts, comprehensive foundation, and the universality of its verses, is a complete constitution for life, a way of governing and of politics, and a call to guidance and salvation.

The Prophet's tradition undertakes to explain its meanings, disclose its contents, defines it where applicable, outlines its details and analyzes its general terms. This legislative unity between the Book and the tradition has produced a general systematic comprehension, and a vast intellectual capacity. This objective fact about the Islamic religion inspired the following legislative rule; "There is not a single occurence without there being a divine decision about it.

Further confirmation of this fact is seen in the Qur'anic verses and narrations of Ahl al-Bait (The Prophet's progeny). Imam Muhammad al-Baqir (a.s.) says: "Allah, the Exalted, left out nothing that the ummah may need without revealing it in this Scripture, and without explaining it to His Messenger (s.a. w.).

For everything He ordained a limit and a sign pointing to it, and ordained apenalty on whosoever transgresses the limit."(7) Imam Ja'far al-Sadiq (a.s.) says: "Allah the Exalted revealed in the Qur'an the explanation of everything. By Allah, He left out nothing needed by His servants, so that no servant can ever say: I wish this was revealed in the Qur'an!

As Allah had revealed this, too, in it."(8) He (a.s.) adds: "There is nothing that is not in the Book (Qur'an) or not in the tradition." The Imam (a.s.) also says: "There is not an affair about which two persons may dispute, without its having a root in the Book of Allah the Exalted, (the problem is that) only men's minds do not attain to it."(9) All these texts confirm the enormous scope of Islam and the vast extent of its legal, organizational, intellectual and convictional horizons, enabling a Muslim to know that Islam has a legal viewpoint and an attitude towards every situation, event and topic that may occur or appear in man's life, throughout time and space.