Every prophet, Muslims believe, was given a miracle that spoke to the strengths of his people. In the time of Moses, magic was mastered, so his miracle overpowered the magicians. In the time of Jesus, medicine was prized, so he healed the blind and the leper by God's permission. In the time of Muhammad ﷺ, the Arabs were unrivalled masters of language and poetry. And so his miracle was not a staff or a healing hand, but a book: the Qur'an.
What Is the Qur'an?
The Qur'an is the sacred scripture of Islam, for Muslims, the literal, unaltered word of God, revealed to the Prophet Muhammad ﷺ through the angel Gabriel over a period of about twenty-three years. It is not a biography of the Prophet ﷺ, nor a book written by him. Muslims believe he was the receiver of it, not its author, which is why the Qur'an speaks to him and even, at times, gently corrects him.
The Qur'an describes itself, from its opening pages, as a source of guidance beyond doubt:
"This is the Book about which there is no doubt, a guidance for those conscious of Allah."
(Surah Al-Baqarah, 2:2)
A Book Preserved, Word for Word
Perhaps the most remarkable fact about the Qur'an is its preservation. From the moment each verse was revealed, it was both written down by scribes and memorised by heart. To this day, millions of Muslims, of every nationality, many of whom do not even speak Arabic, have committed the entire Qur'an to memory, word for word. A child in Nigeria, an elder in Indonesia, and a student in Egypt will recite it identically.
This is no accident. God Himself promised to guard it:
"Indeed, it is We who sent down the Reminder, and indeed, We will be its guardian."
(Surah Al-Hijr, 15:9)
The result is that the Qur'an recited today is, letter for letter, the same text recited by the Prophet ﷺ over fourteen hundred years ago, a claim of textual preservation unmatched by any other book of comparable age.
How the Qur'an Was Compiled
A question non-Muslims often ask is: how did a book revealed piece by piece, over twenty-three years, come to be the single volume we hold today? The answer is a well-documented three-stage history.
- During the Prophet's life ﷺ: As each passage was revealed, the Prophet ﷺ dictated it to scribes, who wrote it down on whatever was available, parchment, leather, bone, and he specified exactly where each verse belonged. At the same time, many companions committed the entire Qur'an to memory. So from the very beginning, it existed in two forms at once: written and memorised.
- Under Abu Bakr: After the Prophet's ﷺ death, a battle claimed the lives of many who had memorised the Qur'an. Fearing any loss, the first caliph, Abu Bakr (may Allah be pleased with him), ordered the scattered written records gathered into a single, verified master copy, each verse cross-checked against both the written fragments and the memories of the reciters.
- Under Uthman: As Islam spread across many lands, the third caliph, Uthman (may Allah be pleased with him), had official copies made from that master and sent to the major cities, standardising the text everywhere so that no differences could creep in. Some of those very early manuscripts survive in museums to this day.
Throughout, the written record was never separated from the living tradition of memorisation, the two guarded one another. It is this dual preservation, checked and rechecked by the companions who had heard the Qur'an from the Prophet ﷺ himself, that gives Muslims their confidence in the text.
The Challenge: Produce Something Like It
The Qur'an stakes its claim to be from God on an open, falsifiable challenge to all of humanity. If it is the work of a man, it argues, then let any man match it. That challenge was issued in stages, each smaller than the last, until it rested on producing a single chapter:
"And if you are in doubt about what We have sent down upon Our Servant, then produce a chapter the like thereof and call upon your witnesses other than Allah, if you should be truthful."
(Surah Al-Baqarah, 2:23)
The Qur'an even predicts that this challenge will never be met:
"Say: If mankind and the jinn gathered together to produce the like of this Qur'an, they could not produce the like of it, even if they were to each other assistants."
(Surah Al-Isra, 17:88)
For the Arabs of the 7th century, the very people who prided themselves on eloquence above all else, and who had every motive to discredit the Prophet ﷺ. This was a direct challenge to their mastery. History records that they could not meet it. Instead of producing a matching chapter, they resorted to boycott, exile, and war.
A Book Without Contradiction
The Qur'an also invites scrutiny of its own internal consistency, extraordinary for a text delivered piecemeal over twenty-three years, through changing and often desperate circumstances:
"Then do they not reflect upon the Qur'an? If it had been from other than Allah, they would have found within it much contradiction."
(Surah An-Nisa, 4:82)
Guidance for All People
Though revealed in Arabic, the Qur'an presents itself not as the possession of one nation but as guidance for all of humanity. It speaks to the deepest human questions about origin, purpose, and what happens after death, and answers them with a consistent vision of a purposeful universe created by a merciful God.
It repeatedly turns the reader's gaze toward the natural world, the alternation of night and day, the raising of the mountains, the joining and parting of the seas, the stages of human development in the womb, presenting them as āyāt, "signs," that point beyond themselves to their Creator. (We explore these signs in later chapters of this guide.)
"We will show them Our signs in the horizons and within themselves until it becomes clear to them that it is the truth."
(Surah Fussilat, 41:53)
Further Reading
- The Qur'an. Read it for yourself, with translation and recitation.
- Sahih al-Bukhari & Sahih Muslim. The two most rigorously authenticated collections of the Prophet's ﷺ sayings.
- Riyad as-Salihin (Imam an-Nawawi), a beloved anthology of hadith on faith, character, and worship.
- The Sealed Nectar (Ar-Raheeq Al-Makhtum), an award-winning biography of the Prophet ﷺ.
- Muhammad: His Life Based on the Earliest Sources. Martin Lings.