The great author Ayatullah Saiyyid A. Al-Khoei,stresses the importance of understanding the historical setting in which the Quran was revealed. He expounds his own views, and refutes Sunni beliefs and concepts categorically concerning the theories of alteration and abrogation in Quran. He discusses many critical and controversial topics connected with the collection and canonization of the text, that has received little attention since classic age.
