Muslims believe that one of the "miracles" of the Quran is its poetry. How could an illiterate man, they ask, write such exquisite poetry unless he was inspired by God?
The grammatical structure of Arabic lends itself to being a poetic language. Many nouns or adjectives, for example, end with the syllable "....eem". Muhammad could create a few lines each ending with one of these words that would be poetry to his listeners. As an example, Sura 66 is called "The Prohibition". The title as well as the final or penultimate words of the first few lines are "tahreem...raheem...aleem...hakeem." The English translation of these words, "prohibition...merciful...all-knowing...wise", of course do not rhyme at all.
The "story behind the story" is often more interesting than the story itself. Muhammad often created Quranic suras to get himself out of a tight spot. In the case of sura 66, he had literally been caught with his pants down. While visiting one of his wives, 20 year old Hafsah, he noticed her beautiful Egyptian Christian slave Mary. Muhammad had already legitimized sex with slaves for his followers, and told Hafsah that her father wanted to see her. As soon as Hafsah left the house, Muhammad had intercourse with Mary. When Hafsah realized her father had not called her and returned home to a locked door, she suspected the worst. Muhammad admitted what he had done, but promised Hafsah he would not sleep with Mary again. Hafsah was still upset, and told another of Muhammad's wives, Aisha, what had happened. Muhammad then claimed that Allah had revealed to him that Hafsah had complained to Aisha, and that Allah had also told him that he was free of his promise not to sleep with Mary again.
Now read the entire sura carefully. Notice who is at fault, who is to blame, who is threatened, and who is exonerated by Allah.