This is something obvious. The Qur'an is a revelation from God Almighty Himself who is far above any form of humanness; to His beloved, Muhammad, peace be upon him and his family.
When you read the Qur'an, even the translations, it is obvious that these are not the words of a human being. They are the words of a Higher Supreme being, God Almighty. Consider the following examples:
"Then We roused them, in order to test which of the two parties was best at calculating the term of years they had tarried!"
The Cave -Surah 18- V 12
"And keep thy soul content with those who call on their Lord morning and evening, seeking His Face; and let not thine eyes pass beyond them, seeking the pomp and glitter of this Life; no obey any whose heart We have permitted to neglect the remembrance of Us, one who follows his own desires, whose case has gone beyond all bounds."
The Cave -Surah 18- V 28
"O men! Here is a parable set forth! listen to it! Those on whom, besides Allah, ye call, cannot create (even) a fly, if they all met together for the purpose! and if the fly should snatch away anything from them, they would have no power to release it from the fly. Feeble are those who petition and those whom they petition!"
The Pilgrimage -Surah 22- V 73
"And strive in His cause as ye ought to strive, (with sincerity and under discipline). He has chosen you, and has imposed no difficulties on you in religion; it is the cult of your father Abraham. It is He Who has named you Muslims, both before and in this (Revelation); that the Messenger may be a witness for you, and ye be witnesses for mankind! So establish regular Prayer, give regular Charity, and hold fast to Allah. He is your Protector - the Best to protect and the Best to help!"
The Pilgrimage -Surah 22- V 78
"As to thee, the Qur'an is bestowed upon thee from the presence of one who is Wise and All-knowing."
The Ant -Surah 27- V 6
"So he (Solomon) smiled, amused at her speech (the ant's speech) ; and he said: O my Lord! so order me that I may be grateful for Thy favours, which thou hast bestowed on me and on my parents, and that I may work the righteousness that will please Thee: And admit me, by Thy Grace, to the ranks of Thy righteous Servants."
The Ant -Surah 27- V 19
These are not the words of a human being. It's obvious.
When you read the Qur'an, even the translations, it is obvious that these are not the words of a human being. They are the words of a Higher Supreme being, God Almighty. Consider the following examples:
"Then We roused them, in order to test which of the two parties was best at calculating the term of years they had tarried!"
The Cave -Surah 18- V 12
"And keep thy soul content with those who call on their Lord morning and evening, seeking His Face; and let not thine eyes pass beyond them, seeking the pomp and glitter of this Life; no obey any whose heart We have permitted to neglect the remembrance of Us, one who follows his own desires, whose case has gone beyond all bounds."
The Cave -Surah 18- V 28
"O men! Here is a parable set forth! listen to it! Those on whom, besides Allah, ye call, cannot create (even) a fly, if they all met together for the purpose! and if the fly should snatch away anything from them, they would have no power to release it from the fly. Feeble are those who petition and those whom they petition!"
The Pilgrimage -Surah 22- V 73
"And strive in His cause as ye ought to strive, (with sincerity and under discipline). He has chosen you, and has imposed no difficulties on you in religion; it is the cult of your father Abraham. It is He Who has named you Muslims, both before and in this (Revelation); that the Messenger may be a witness for you, and ye be witnesses for mankind! So establish regular Prayer, give regular Charity, and hold fast to Allah. He is your Protector - the Best to protect and the Best to help!"
The Pilgrimage -Surah 22- V 78
"As to thee, the Qur'an is bestowed upon thee from the presence of one who is Wise and All-knowing."
The Ant -Surah 27- V 6
"So he (Solomon) smiled, amused at her speech (the ant's speech) ; and he said: O my Lord! so order me that I may be grateful for Thy favours, which thou hast bestowed on me and on my parents, and that I may work the righteousness that will please Thee: And admit me, by Thy Grace, to the ranks of Thy righteous Servants."
The Ant -Surah 27- V 19
These are not the words of a human being. It's obvious.