Western scholars who have examined the lives of the Companions of Prophet Muhammad and who have compared the different copies of the Qur’an which were made at different times to the contemporary versions accept that the Qur’an is an original book which has undergone no changes at all.
Yet they have a doubt because of their fanaticism:
Let me try to show that the Qur’an is not the word of Prophet Muhammad with some examples of text from the Qur’an. I hope that when they read this, they will understand and benefit from it.

Example-1
“Glory be to Him Who created pairs of all things, of what the earth grows, and of their kind and of what they do not know.” (Ya-seen, 36)
Allah Almighty states that He created every kind of creature, human, ant, or elephant, in pairs; at the time when the Qur’an was revealed the people of this region, although they understood this to be true of the animals around them, had no idea how far the truth of this statement went.
People did not know about micro parasites until the microscope had been invented. They were not aware of the fact that different micro parasites surrounded their mouths, noses, and skins.
Allah Almighty informs us that He created all creatures in pairs. A spoon of water contains millions of micro parasites. They have also mouths, stomachs, digestive systems and reproductive organs.
What about inorganic entities?
The atom, which is the basic component of matter, consists of negatively charged electrons and positively charged protons, and revolves around a nucleus.
How mighty is Allah Who has created basic components of matter, the electrons and protons in pairs, as negative and positive!

Example-2
“And We have made the heaven a guarded canopy.” (Anbiya, 32)
Allah Almighty protects sky against meteors with atmosphere, which is made up of gases that filter light and heat and which have no color, taste, or smell.
When meteors that fall from space enter into the atmosphere, they are burned up by the heat of 2000°C degree and are transformed into gases and dust. Furthermore, the ozone layer absorbs dangerous ultraviolet rays and thus protects the world. But how could people have understood this in the 7th century?

Example-3
“He (Allah) has made the two seas to flow freely (so that) they meet together: Between them is a barrier which they cannot pass.” (Ar-Rahman,19-20)
While German scientists explored Bab el Mandeb, where the waters of the Aden Gulf and the Red Sea converge, they realized that waters of Red Sea and the Indian Ocean do not mix. Likewise, the French oceanographer Cousteau found that the waters of the Atlantic Ocean and the Mediterranean Sea do not mix. When he was told that the Qur’an told us about this 1,400 years ago, Cousteau was very surprised. 

Example-4
 “And He it is Who created the night and the day and the sun and the moon; all (orbs) travel along swiftly in their celestial spheres.” (Anbiya, 33)
Allah Almighty informs us that He set up an order in the material world and created day and night by turning the earth in its orbit. He also created the sun and moon, which travel along in their celestial spheres.
Galileo was summoned before the ecclesiastical court when he declared that the world revolves around the sun. If the Pope had been aware of the Qur’an, he would not have excommunicated Galileo, imprisoning him until he turned blind.

Example-5
“ What! now! and indeed you disobeyed before and you were of the mischief-makers!
But We will this day deliver you with your body that you may be a sign to those after you, and most surely the majority of the people are heedless to Our communications.” (Yunus, 91-92)
The Pharaoh was the bloodiest dictator of its time. When he was about to drown, he said: “I submit.” Yet his testimony was not accepted and Allah said: “What! Now! And indeed you disobeyed before and you were of the mischief-makers. But We will this day deliver you with your body that you may be a sign to those after you, and most surely the majority of the people are heedless to Our communications.”
While thousands of soldiers of Pharaoh were destroyed in Red Sea, the corpse of the Pharaoh was washed up on a hill on the shore. The Qur’an tells of this event, of which nobody was aware or had heard of before. The Qur’an, a genuine divine book, is not a legend, story or the word of humans. 1,400 years ago, it stated that the corpse of the Pharaoh was to be found on a hill on the shores of the Red Sea, and would be found to be a lesson for coming generations. 3,000 years after the Pharaoh’s death, British researchers who were exploring the shores of the Red Sea, came across a puzzling situation. There was a man’s corpse that had been preserved for many years. His flesh, hair and skin had not decayed and he was laying his face downwards like he was prostrating. Researchers took the corpse immediately for examination. Soon, they declared that this was the corpse of the Pharaoh, which was put on display in the British Museum.