"Say: If the whole of mankind and Jinns gather together to...
"Say: If the whole of mankind and Jinns gather together to make out a book like this Holy Qur’an, they could not do it even if they back up each other with help and support." (Holy Qur’an, 17:88) "If you are in doubt of what we have revealed to our servant (Muhammad), then produce only one chapter comparable to this book; and call your witnesses or helpers to help you, if there are any besides Allah to assist you; if what you say be true.
But if you fail to do so, and certainly you will fail, then fear the Fire whose fuel is man and stones prepared for the unbelievers.” (Holy Qur’an, 2:23) We believe that age will not make the Holy Qur’an old and out of fashion; but rather its miraculous points and views shall appear more and more clearly, and its greatness shall become more evident to the world.
We have a tradition narrated by Imam Jafar Sadiq (a.s) that: "God has not made the Holy Qur’an to answer a certain age or distinct group of people.
It shall always remain fresh, new and lively." Holy Qur’an is Not Altered At All We believe that this book, the Holy Qur’an which is now at the hands of the Muslims, is the exact and unaltered copy of that which was revealed to our prophet Muhammad nothing less and nothing more .A group of trustworthy scribes chosen by the prophet himself took note of the revelations from the very beginning up to the end, and Muslims had it a duty of must, to read and recite the verses by day and night.
A large group of Muslims committed the book to memory and a group of them had it on the scrolls. Those who had the book in their memory and those who could recite it for the others, had always had a very respectful position among the believers. Such customs and else, prevented the least amount of changes or any alteration to take place in the book.
Additionally God Himself has promised and guaranteed to look after His book and keep it safe and secure until the end: "We have without doubt, sent down the Qur’an, and We will assuredly guard it." (Holy Qur’an, 15:9) All the learned and researchers in Islam, whether Shia or Sunni, agree that even the slightest alteration has not been made to this Holy Book.
Some literate persons, discuss some rare and obscure tradition (hadith) that may mean that some changes have taken place, but the highest majority of those who have the knowledge of Islam, reject that, taking it be false and the mistake of some unaware commentators.