Qaf 50:45

It has been recorded in the Quran, again and again, that the Prophet’s mission was only to convey the message of God to the people and it was not his responsibility to change them. On the other hand, it has been stated in the Quran on more than one occasion that, through him, the Prophet Muhammad, God would cause the religion of Truth to prevail over all other religions. These two statements, in fact, relate to different aspects of the Prophet Muhammad. From one aspect, he was the messenger of God. From another aspect, he was the ‘last of the prophets.’ As a messenger of God, his mission was the same as that of all other prophets, namely, to convey the Truth to the people in a proper manner. But, as he was the last of the prophets, it was the intention of Almighty God to create such conditions through him that the word of God should remain preserved for all eternity, so that there should be no necessity to send any further prophets. This second aspect of the Prophet necessitated that, through him, a revolution be brought about which should end the dominance of polytheism, thereby establishing Islam as a dominant force which would guarantee the continuance of Divine guidance forever.