Rational and Quranic Evidence To Show That The Quran Is The Speech Of Allah To His Messenger Muhammad(saw)

One of the most demonstrative and logical evidences which prove that the Quran is the revelation of Allah to His Messenger(PBUH),is the fact that Allah had challenged the unbelievers of Quray-esh to produce a book like the Qur'an.Although the Qur'an was revealed in their own language,and they were masters of influence,eloquence,poetry and literature,they failed even to produce one surah like it.Allah stated that if all of mankind,supported by jinn,try to produce a book like this Qur'an,they will never be able to produce the like of it:

>>Say: "If the whole of mankind and jinns were to gather together to produce the like of this Qur'an,they could not produce the like thereof,even if they backed up each other with help and support<<(QUR'AN 17:88)
As the words of Allah are communicated to mankind through a messenger sent from Allah,consequently,Muhammad who communicated the Qur'an to mankind is a messenger sent From Allah.This has been stated in the Qur'an:-
>>Muhammad is not the father of any of your men,but(he is) the messenger of Allah,and the seal of the prophets:and Allah has full knowledge of all things<<(Qur'an 33:40)

Allah also said:
>>We have not sent thee but as a "messenger" to all mankind giving them glad tidings,and warning them (against sin),but most men know not<<(Quran 34:28)

Allah said:
>>We sent thee not,but As a mercy for all creatures<<(QURAN 21:107)
Truely the quran is a book from Allah and Muhammed is a Messenger of Allah.May Allah's mercy descend upon him and to All those who Follow his way