is that you have never read the Glorious Qur'an and you are speaking out of ignorance.
I also notice that you are very unfamiliar with the Bible. It is filled with little stories, flattery, rhetoric, affirmation. Despite your snobbish take on the Bible, one of the reasons that it became so popular was because it is easily understood and adopted by illiterate or semi-literate societies - just the type of societies that existed at that time.
The Corinthian serves as the darkness, and the fear of darkness, in every human heart. A black mirror made to reflect everything about itself humanity will not confront.