Did Prophet SAW Write The Quran?
Here’s my take on your question: The motive behind a book will point to the author of the book. The sole purpose of monotheism and submission to the Will of God and excel in good is to guide people how to invest their resources on solving others problems with a hope for a return in the far future (even the next life) and persevere the hardship of the present and that’s without compulsion or compromising the freewill, without which human cannot deliver their mission on Earth as co-designers – the cause of their creation. No human author of the book can benefit through such an ideology as he wont live long enough to benefit from the investment of that far future. Climate change is an example, people care more about their present than the future generations even in this 21st century when most of the pressing problems have been solved. Imagine you talk about investing in the future when your own survival is at stake in the old days. In addition, Quran is far superior than world’s biggest philosophers in providing three fundamental moral values (1) freedom, (2) fairness and (3) excellence as the most powerful enablers to mankind that help them not only in surviving but also thriving by co-creating solutions bit by bit thru generations to the complex problems they are exposed to. Only the Creator can be interested in the long term survival of human species on Earth until they deliver the mission they are tasked to. Prophet Mohammad (SW) had no motive or personal interest or background to author a book like that. If you ponder on the verses of Quran, you will find an irrefutable evidence of divine intervention in the book. However, at the same time it’s hard to defend a view that the whole Quran is the word of God. A possibility of human additions or errors here and there in the book cannot be completely ruled out (the main message is intact though). One should use his common sense to decide which of the verses are helpful in surviving and thriving through co-existence and co-creation and try to benefit from them.