Why did we need the Last Prophet, the Prophet Muhammad, (Sallalahu Aleihi Wasalam) and the last Holy Book, the Holy Qur an?
Answer 13: • We needed a last prophet, which is Muhammad, (Sallalahu Aleihi Wasalam) because the Divine message many other prophets brought has been altered and misunderstood. We needed a last book because this, the Qur an, is the only book that has not been altered and cannot be altered, as Allah has promised to protect it. Millions of Muslims know it by heart. If all copies of the Qur an (may Allah forbid !) were to be burned, the very next moment the Qur an would spring to life again on the tongues of the millions who know it by heart. So you can see, there is no chance of this book, the Qur an, being lost or altered.