The best part in my opinion of the Qur'an is Al-'Uzza, al-Lat and Manah which are Allah's three daughters (Sura 53:19-23.) Then after saying that the devil himself told him to say it and he was tricked. Which means he is admitting the devil's own words come out of his mouth.
Later he admitted a large part of what he said was from the devil himself.
of course Muslims compartmentalize the Qur'an and the hadiths to what are strong and weak. So it's all good.
The Satanic verses is a great example of Muslims ignoring any truth that conflicts with their hermetic world view.
This is something Mohammed's earliest biographer attested to, and yet they don't even contemplate whether or not their prophet was controlled by the Devil.