I like to see the Qu'ran ... as a poetry book
There were plenty of poets in Arabia as oratory and poetry was a prized skill and this is still the case. However, the Prophet specifically denied he was one:
And it is not the speech of a poet - little do you believe [69:41]
For many classical scholars Iblees was seen as an angel but more contemporary ...
The Qu'ran is not a book on geology, it's a spiritual guide. For example, we have:
Had we sent this Qu'ran down on a mountain you would have surely seen it humbling itself and rent asunder by fear of Allah. These are the parables that we tell the people so that they may perhaps give thought.
This is not about mountains, but about the gravity of the divine ...
In Arabic repeating a word is simply a confirmation or an emphasized confirmation that intents to clear any doubt about the importance of what is said or to make clear that this is meant and nothing else.
Here a definition of التّوكيد (at-Tawakyd: confirmation) in Arabic grammar (translation by google translate):
هو أسلوب لُغويّ يؤتى به للتّحقيق وإزالة ...