Professor Ansarian considered the Holy Quran as the highest reason for confirmation of the prophecy of the messenger of Allah and said: according to the commander of the faithful, Imam Ali (peace be upon him), Allah Almighty provided the messenger with a light which was the holy Quran and it brought about the confirmation of his prophecy so that the people stop asking him about the reason for his prophecy. the Holy Quran is the highest reason for the rightness of the prophecy of the messenger of Allah. The Holy Quran made people believe that this person has been appointed to the prophetic mission by Allah Almighty.
source : erfan.ir