It is one thing to say the Qur'an claims to be from God; it is another to ask why anyone should believe that claim. Muslims do not accept the Qur'an as God's word by blind inheritance alone. They point to a set of reasons — evidences open to anyone willing to examine them. This chapter gathers the most important of them.
1. It Came Through an Unlettered Man
The Prophet Muhammad ﷺ could neither read nor write. He had no library, no teachers of scripture, and no history of composing poetry — the prized art of his people. Then, at forty, he began to recite a book of such depth and eloquence that it silenced the greatest poets of Arabia. The Qur'an points to this very fact as evidence:
"And you did not recite before it any scripture, nor did you inscribe one with your right hand. Otherwise the falsifiers would have had cause for doubt."
(Surah Al-'Ankabut, 29:48)
2. The Challenge That Was Never Met
The Qur'an stakes its own truth on a falsifiable challenge: if it is the work of a human being, then let human beings produce something like it — even 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…"
(Surah Al-Baqarah, 2:23)
The masters of Arabic in the Prophet's own time — motivated by every kind of hostility — never produced that matching chapter. Fourteen centuries later, the challenge still stands open. For Muslims, a challenge issued so boldly, and never met, is not the behaviour of a human forgery.
3. Its Preservation Is Unmatched
The Qur'an has been preserved letter-for-letter since the day it was revealed — written by scribes and memorised in full by countless people in every generation, across every continent. God promised this preservation directly:
"Indeed, it is We who sent down the Reminder, and indeed, We will be its guardian."
(Surah Al-Hijr, 15:9)
That a text of such age exists today in a single, universally agreed form — reproducible from the memories of millions alone — is, to Muslims, a fulfilled promise.
4. It Contains No Contradiction
The Qur'an was revealed piece by piece over twenty-three years, amid war, migration, triumph, and loss. A human author writing under such shifting conditions would inevitably contradict himself. The Qur'an invites the reader to test it against exactly this standard:
"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)
5. It Foretold Events Yet to Come
The Qur'an contains prophecies that were later fulfilled. Among the most cited is its prediction that the defeated Romans (Byzantines) would, against all expectation, be victorious again within a few years — revealed at a time when their defeat seemed final:
"The Romans have been defeated in the nearest land. But they, after their defeat, will overcome within a few years."
(Surah Ar-Rum, 30:2–4)
History records that the Byzantines did indeed reverse their fortunes within the span the Qur'an described.
6. It Describes Signs in Creation
The Qur'an repeatedly draws the reader's attention to the natural world — the origin of the universe, the mountains, the seas, the stages of human development — describing them as āyāt, "signs," pointing to their Creator. For Muslims, that a 7th-century book, delivered by an unlettered man, speaks of these things without the errors of the myths of its age is itself a sign worth reflecting upon. (These are explored in the following 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)
7. Its Effect on the Heart
Beyond argument, Muslims speak of something harder to measure: the effect of the Qur'an on the one who reads it sincerely — a sense of being addressed, comforted, and known. The Qur'an describes this response in those who encounter the truth:
"And when they hear what has been revealed to the Messenger, you see their eyes overflowing with tears because of what they have recognised of the truth."
(Surah Al-Ma'idah, 5:83)
In Summary
Muslims believe the Qur'an is the word of God because of its inimitable language, its unmet challenge, its perfect preservation, its freedom from contradiction, its fulfilled prophecies, its signs in creation, and its power over the sincere heart. Taken together, these are the grounds on which nearly two billion people rest one of the most consequential beliefs in human history.