THE QUR’AN IS PROTECTED FROM CHANGE BUT OTHER BOOKS ARE NOT.

•  The Qur’an is“Confirming the scripture that was before it and stands as a guardian over it. ”Thus, by the Qur’an Allah abrogated all the Books. Allah has also guaranteed its protection from any play or mischievous distortion. “Indeed, We sent down the message and We will guard it.” (15:9) That is because the Qur’an is a proof against mankind till the Day of Judgement.
• The previous scriptures meant for a limited period that ended with the revelation of what abrogated them and exposed what has taken place in them of distortion and change. That is why they were not protected from corruption. They underwent distortion, addition and omission. “Some of the Jews prevent words from their meanings.” (4:46) “So woe to those who write the Book with their hands, and then say, ‘This is from Allah,’ that they may sell it for little price. So woe to them for what their hands have written and woe to them for their earnings.” (2:79) “Say, who sent down the Book that Moses brought as a light and a guidance to people? You put it into sheets of paper showing some of them and concealing much.” (6:91) “And there is a group among them who twist their tongues with the Book, that you may think it is a part of Book, but it is not a part of Book. And they say ‘it is from Allah,’ yet it is not from Allah, and they tell a lie against Allah and they know it. It is not for any human being to whom Allah has given the Book, the Wisdom and the Prophet Hood to say to men “Worship me instead of Allah” (3:78-79) “People of the Book! Our Messenger has come to you, making clear to you many things you have been concealing for the Book and forgive you much. A light has come to you from Allah and a Glorious Book, with which He will guide whoever follows His pleasure in the way of peace, and bring them forth from darkness into the light by His will.” (5:15-16)http://www.islamicbook.ws/english/