Intellectual Proofs that the Quran is the revelation from God
بِسْمِ اللهِ الرَّحْمَنِ الرَّحِيم
Praise be to God the Creator of the world, the One Who exists without beginning, without end, without location , without a “how” and Who does not depend on time. Nothing resembles Him in anyway and He hears and sees everything without organs. Whatever you imagine, God is different from that. May the elevation in degree and preservation of his community of what he fears for it, be granted to our master Muḥammad Al-‘Amin, the Honest One, who called for following Islam, the religion of truth, the religion of all the Prophets: of the First, Adam, to the last Muḥammad.
God (Allâh) is the creator of all creations, He sent Prophets to guide the people, and those Prophets were believed and followed because they were supported by Miracles. One of the great miracles of Prophet Muḥammad (Peace be upon him) is al-Qur'ân.
First of all:
1. Prophet Muḥammad challenged the tribes who had articulated the Arabic language to come up with one verse of the shortest verses of the Qur'ân, and they couldn't do that. The Qur'ân is such a very rich language, that it's impossible for a man to be able to make it up. If they were able to do that, they would have saved themselves and their tribes, from the bloodshed and met the challenge, but they didn't.
So the Prophet came to challenge the people of Quraysh with the Quran. How ? The Arabs back than had articulated the Arabic Language and mastered it, and Prophet Muḥammad (May peace and blessings be upon him and all Prophets and messengers) was known that is he did not read or write what is read and written. And he called people to Islam.
Among his miracles that prove his truthfulness, was the Qur'ân. He came with this great challenge ; with the Qur'ân, which is known to have very rich words. The people could not meet the challenge. If they were able to meet the challenge of the Prophet, and come up with one short verse that meets or equals one that's from the Qur'ân, they would have saved themselves from the bloodshed.
So, the Qur'ân cannot be human-made, or angel-made. It's the speech of Allâh that is unlike the speech of the creation. The Arabic words that we read in the Holy Book of the Quran are expressions of the Eternal speech of Allâh which is not a letter or sound, because Allâh does not resemble the creations in any way.
2. Prophet Muḥammad did not read or write what is read and written. The Qur'ân is revealed in a rich language. At the time when the Arabs were very articulate in the Arabic language, they were known for that, and they were strong in poetry. It's well known that Prophet Muḥammad was raised as an orphan, he did not learn from knowledgeable or clever people. Rather, he was a Prophet with miracles.
3. One remarkable feature of the Qur'ân is its content of an abundant wealth of scientific information. Much of this information has only been discovered by mankind in the last century. If this points to anything, it certainly indicates that the Qur'ân could not have been written by any human being. When the Qur'ân was revealed to Prophet Muḥammad 14 centuries ago, there simply was no human being who had any access or knowledge of such scientific knowledge. The scientific information in the Qur'ân covers main fields of knowledge.
4. And finally, among the intellectual proofs that it's intellectually impossible that the Quran is made up by Prophet Muḥammad, or by a human, are the facts and the astonishing information and news in the Qur'ân about previous nations and previous Prophets and about future events which he had foretold about such as the fall of the Roman empire and many other events. This all proves that he was the Prophet and messenger of Allâh.
Note: The Qur'ân is not man-made. It pertains the orders of Allâh. The Qur'ân we read now, is in a language that we understand. But the speech of Allâh is neither a letter, language, or sound. But what we read in the holy books, are expressions of the eternal speech of Allâh. Because Allâh does not resemble the creations in any way.