One of the most important characteristics of the Qur'an is that it remains today, the only holy book which has never changed; it has remained free from any and all adulterations. Sir William Muir noted, "There is probably in the world no other book which has remained (fourteen) centuries with so pure a text." The Qur'an was written down during the lifetime and under the supervision of the Prophet, who himself was illiterate, and it was compiled together shortly after his death by a rigorous method which scrutinized both written and oral traditions. Thus its authenticity is unblemished, and is its preservation is seen as the f...