(Sura 3 v 164)
All these beliefs mean that, as far as Muslims are concerned, the Quran has absolute authority. If the Quran says something, then if you are a good Muslim you must do it.
It clearly follows from the nature and authority of the Quran that it is the most holy thing a Muslim possess. Therefore, most Muslims will keep their Quran wrapped up so that it does not becomes polluted, they will keep it higher then other books and will be clan (wudhu) before touching it.
All the regulations apply to the Arabic Quran. Muslims believe that Arabic is the language of god because the Quran was revealed and is eternal, Arabic must be the language.
Apart from the basic teachings on the Quran, Muslim scholars put forward several reasons for believing that the Quran is the believing of god.
It is the only miracle which Muhammad performed and all prophets perform a miracle.
There are no differences between the different copies of the Quran; therefore it is the word of god.
The Quran contains all the fundamental Muslim beliefs.
Ramadan is the month in which the Quran was sent down as a guide to mankind, also clear signs for guidance and judgement between right and wrong.
So the Quran is a book about what Muslims should believe and how they should behave, much of which originally appeared in prophetic forms.
Although the Quran is regarded as complete and unalterable, like nay other book there can be different ideas about what different passages mean. There are also some items which are not covered by the Quran.
A good example is with salah. The Quran tells you to pray at first light, midday. Afternoon and evening facing the Kibla having first washed. For this we Muslims use the Sunnah (example) of the prophet and hadith (what he said).
The Final revelation of Allah Subhanahu is the Quran and the final and complete Deen is Islam as Allah Subhanahu says:
"This day have I perfected your religion for you and completed my favour unto you, and have chosen for you as religion AL- ISLAM". (Surah Ma'edah, Ayat 3)"
Rasulallah (SA) was the only person who had the right to interpret the Quran during his life and he taught the Muslim ummah the rituals of Daaim al Islam. The Muslims in those days used to look up to him for their queries regarding their Deen and Rasulallah (SA) used to answer them to their content.
It is agreed by the muslin ummah that even though the Quran is complete, it needs to be interpreted to solve the problems that arise each day. Rasulallah (saw) used to interpret them when ever need arose. Interpretation of the Quran is a part of Shari’ at and the legal concepts of Islam. It is agreed that Rasulallah (SA) is the lawmaker of Islam by the commands of Allah and the knowledge imparted to him through 'Wahye'. If Allah has completed the Deen of Islam it is not to be doubted that he had taught Rasulallah (SA) each and every aspect of life, or else the divine law would remain incomplete.
As the Quran is the word of Allah it must be strictly followed in the same ways, the teachings contained in the prophets Sunnah must be observed by all who profess to be Muslims.