The Qur'an is the holy book of Islam, considered by Muslims to be the literal word of Allah as revealed to the messenger of Allah, Prophet Muhammad (Mohamed) over a period of 23 years. It contains 114 chapters or surahs, which are divided into verses or ayahs. The Quran is the primary source of guidance and instruction for Muslims. It covers a wide range of topics, including beliefs, ethics, morality, history, and law. The Holy Quran is in classical Arabic. Some people consider it one of the greatest literary works in the Arabic language. People also consider it a miracle of the Prophet Muhammad, as he was illiterate and could not have produced such a work of such great literary and theological importance on his own. Muslims believe that Al Quran is the final revelation from God and that it contains complete and perfect guidance for humanity. It is memorized and recited by Muslims all over the world. Its teachings have had a profound impact on the lives of millions of people throughout history.