The Qur'an is the True, Inimitable Word of Allah and It is a Miracle
The Qur'an has a miraculous nature that cannot be imitated. No one can produce anything similar to the Qur'an, nor ten Surahs or even one Surah like it. The eloquence, clarity, precision and grace of the Qur'an cannot be but from Allah. The great and abundant principles and meanings within the Qur'an -- which are of great benefit in this world and for the Hereafter -- cannot be but from Allah. There is nothing like His High Self and Attributes or like His sayings and actions. Therefore His Words are not like the words of His creatures. This is why Allah said:
In the concluding verse (32), it was said: فَذَٰلِكُمُ اللَّـهُ رَبُّكُمُ الْحَقُّ ۖ فَمَاذَا بَعْدَ الْحَقِّ إِلَّا الضَّلَالُ (So, that is Allah, your Lord in truth. And what is there, after truth, but error?), that is, ` this is the Sacred Being whose attributes of perfection have just been mentioned. Once you have found the Truth, there remains nothing else to find except error and straying. In other words, once it stands proved that Allah Ta` ala is the only true and rightful object of worship, it is terribly senseless to abandon this truth and allow yourself to be diverted elsewhere.
important note
In relation to issues of religious beliefs embedded in this verse, it must be borne in mind that the statement: مَاذَا بَعْدَ الْحَقِّ إِلَّا الضَّلَالُ (What is there, after truth, but error?) proves that there is no intermediary link between truth and error. What is not the truth will be included in error and straying. There can be no such thing that is neither truth nor error. And it is also not possible that two opposite things could be the truth. This is an established rule in the sight of the majority of scholars in the Muslim Ummah. However, difference exists among ` Ulama' regarding minor and subsidiary juristic issues. In the view of some of them, both sides would be considered as on truth in Ijtihad-based issues and, according to the majority of them, there is consensus on the view that the taking of contra-position in Ijtihad-based problems cannot be termed as error and straying.
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 39–40
The Quran is its own proof. With its superior literary style, it is quite inimitable; and this in itself is enough to prove that it presents superhuman discourse. Had it been the work of a human being, it would certainly have been possible for other human beings also to create a similar discourse by their own efforts. The second proof of the Quran being a divine discourse is that it fulfills the prophesies made about it while waiting for a final book of guidance. The Quran has appeared in answer to this expectation. Then why should anyone have any doubt about it? Moreover, it is the details of the ‘Book’ which elucidate and present in correct and unadulterated form the divine teachings which are the essence of all divine scriptures. This is a clear indication which shows that the Quran has come from God, on whose behalf the previous divine scriptures had come. Claims that the Quran is not the product of divine wisdom, its having been authored by a human being, can be instantly dismissed by asking the claimants to produce a book the equal of the Quran or even a chapter as excellent as those of the Quran. Neither they nor anyone else will be able to do so. Despite their claims having been proved incorrect, they still challenge the Quran. And if they do so, it is because they are devoid of any fear of the consequences of rejecting the Quran. They are not afraid that, by rejecting the Quran, they will have to suffer severe retribution. Their antagonistic behaviour is caused by the flippant attitude developed in them due to their fearlessness and not because of any kind of rational or cogent line of reasoning.