Only God Can Author the Quran
[10:37] This Quran could not possibly be authored by other than GOD. It confirms all previous messages, and provides a fully detailed scripture. It is infallible; for it comes from the Lord of the universe.
[10:38] If they say, “He fabricated it,” say, “Then produce one sura like these, and invite whomever you wish, other than GOD, if you are truthful.”
[10:39] Indeed, they have rejected this without studying and examining it, and before understanding it. Thus did those before them disbelieve. Therefore, note the consequences for the transgressors.
[10:40] Some of them believe (in this scripture), while others disbelieve in it. Your Lord is fully aware of the evildoers.
[10:41] If they reject you, then say, “I have my works, and you have your works. You are innocent of anything I do, and I am innocent of anything you do.”
[10:42] Some of them listen to you, but can you make the deaf hear, even though they cannot understand?
How do we examine the Quran in 10:39?
We should study both the mathematical structure of the Quran and the arguments of its word.
Follow the Word of God
[39:18] They are the ones who examine all words, then follow the best. These are the ones whom GOD has guided; these are the ones who possess intelligence.