[Quran 56:76] This is an oath, if you only knew, that is awesome.* ](Chapter 56, The Inevitable (Al-Waaqe‘ah) Footnotes)
[56:77] This is an honorable Quran.
[56:78] In a protected book.
[56:79] None can grasp it except the sincere.*
So, only those who are sincere can understand Quran. After all, GOD asks us many times if we wish to learn the Quran as HE made it easy to learn (contrary to the popular belief that no human can understand it).
[Quran 54:17] We made the Quran easy to learn. Does any of you wish to learn?
[54:22] We made the Quran easy to learn. Does any of you wish to learn?
[54:32] We made the Quran easy to learn. Does any of you wish to learn?
[54:40] We made the Quran easy to learn. Does any of you wish to learn?
As well, GOD states that HE is the teacher of the Quran, NOT the Mullahs.
[Quran 55:1] The Most Gracious.
[55:2] Teacher of the Quran.
And if we want to increase our knowledge we must implore GOD.
[Quran 20:114] Most Exalted is GOD, the only true King. Do not rush into uttering the Quran before it is revealed to you, and say, "My Lord, increase my knowledge."
So, those who follow conjecture (hadiths / Sunnah) are not sincere according to the Quran.
Peace
submitmj