The Noble Qur’an is the eternal miracle of Prophet Muhammad, sallallaahu ‘alaihi wa sallam. Every Prophet was supported with a miracle(s) and upon his death it disappeared, except Prophet Muhammad whose miracle remained, preserved and protected, namely the Book of Allah, His divine revealed Word. Allah Says (what means): "Falsehood cannot approach it from before it or from behind it." [Qur’an 41:42]

Allah clearly stated that the Qur’an is His Word, Saying (what means):

"And if any one of the polytheists seeks your protection, then grant him protection so that he may hear the Words of Allah [i.e. the Qur’an]." [Qur’an 9:6], and in His Saying (which means): "Those who remained behind will say when you set out toward the war booty to take it, 'Let us follow you'. They wish to change the Words of Allah." [Qur’an: 48:15] These two verses prove that the Qur’an is the Word of Allah and that He sent it down to Prophet Muhammad, sallallaahu ‘alaihi wa sallam.

The Sunnah of the Prophet (his sayings) further proves this fact; Jaabir, may Allah be pleased with him, narrated: "The Prophet used to offer his message to people during the season of Hajj and say: "Is there a man who would take me to his tribe (i.e. to convey the message to them), because the (tribe of) Quraysh have prevented me from conveying the Word of Allah?" [Ahmad & At-Tirmithi]

There are many logical and substantial evidences proving this fact, such as the inability of the polytheists to come up with one single verse, let alone a whole chapter, that is similar to it. This is so, despite their eagerness and ambition to prove the Prophet wrong in what he was calling to, and their strong command of the Arabic language in which the Qur’an was revealed. Undoubtedly, this is evidence that the Qur’an is not made by or the words of humans.

The Qur’an contains news of past nations and other unseen matters which serve as great proof that it is the Word of Allah. When the Persians defeated the Romans in battle, the Qur’an addressed the issue and informed that the Romans would overcome the Persians in few years to come as Allah Says (what means): "The Romans have been defeated (i.e. By the Persians) in the nearest land. But they, after their defeat, will overcome." [Qur’an 30: 2-3]

Furthermore, the Qur’an consists of scientific miracles by highlighting certain scientific facts which were not discovered except fourteen centuries later, such as the Qur’an proving that there is a barrier between the salty water and fresh water where they meet preventing them from mixing, as Allah Says (what means): "He released the two seas (the two bodies of water: fresh and salt), meeting [side by side]. Between them is a barrier [so] neither of them transgresses." [Qur’an 55: 19-20] Modern science discovered this to be a fact.

The fact that tranquility and assurance can be found upon reading the Qur’an which is not felt when reading any other book, is yet another proof that it is the Word of Allah, as Allah Says (what means): "Those who have believed and whose hearts are assured by the mention of Allah. Unquestionably by the remembrance of Allah hearts are assured." [Qur’an 13: 28]

Furthermore, being cured by virtue of reading the Qur’an over a sick person can be added to the list of evidences proving it to be the Word of Allah. Allah Says (what means): "And We send down of the Qur’an that which is healing and mercy for the believers." [Qur’an 17: 82]

Lastly, the evidences proving the Qur’an to be the Word of Allah are too many to numerate in one article, and so we conclude with the saying of Al-Waleed Ibn Al-Mugheerah, one of the leaders of the polytheists who was requested to criticise and censure the Qur’an. After hearing parts of it from Prophet Muhammad, sallallaahu ‘alaihi wa sallam, he said: "What can I say? I swear by Allah! There is no man who knows poetry better than me, and it does not sound like anything I ever heard. The only thing I can say is that it has sweetness to it, and it is so appealing. It is so fruitful (to the heart) and abundant (in its benefits). Indeed, nothing rises above it in style, and it surely destroys anything that challenges it." [Al-Haakim & Al-Bayhaqi]

This is the Qur’an, the Word of Allah, which confounds humans' capabilities due to its inimitable style, justice and accuracy. The Qur’an still challenges people and people remain incapable of challenging it, and it remains the clear evidence from Allah against its enemies and opponents. All efforts to deny its authenticity have failed.
Article source: http://www.islamweb.net/emainpage/