Qur'an is a book that can train Prophets
Qur'an is a book that can train Prophets, for Prophets are of two kinds:
Those that are designated to Prophethood by God, and the ‘Prophets of Perfection’ that acquire the perfections of the prophets as a result of their beliefs, and acting upon the commands of the Qur’an. Based on this, the Qur’an trains prophets of perfection. Of course if Man has the capacity, with the permission of God, the doors and the walls would become his teacher; otherwise no word will influence him as the words of the Prophet, peace be upon him and his pure progeny did not influence Abu Jahl! What seditions the students of the Qur'an and the Prophet, peace be upon him and his progeny did after his demise!