What is the Quran?

The Quran is the constitution of the Muslims from which they derive the teachings which organize both their religious and everyday affairs. It differs from the previous Divine Books in the following ways:

It is the last Divine Book which was revealed, and for that reason, Allah, the Exalted, promised to protect it from any distortion until the Last Day.
Allah says:
(Indeed, it is We who have sent down this Reminder [i.e., the Quran] and indeed, it is We who are its Guardian. ) (15:9)
The Quran includes all the legislations which reform society and guarantees happiness for all in its implementation.
The Quran has documented the stories of the Prophets and Messengers, and what happened between them and their peoples, from Adam till Muhammad, may Allah exalt his mention.
It was revealed to all of mankind so that they would live a life of peace and happiness, and to take them out of darkness and bring them into the light.
Reciting, memorizing and teaching it are acts of worship.
What Do They Say About the Quran?

Maurice Bucaille said in his Book:

The Quran, and Modern Science: 'A totally objective examination of it [the Quran] in the light of modern knowledge, leads us to recognize the agreement between the two, as has been already noted on repeated occasions.

It makes us deem it quite unthinkable for a man of Muhammad's time to have been the author of such statements, on account of the state of knowledge in his day. Such considerations are part of what gives the Quranic Revelation its unique place, and forces the impartial scientist to admit his inability to provide an explanation which calls solely upon materialistic reasoning.'