Bismillah 1) The thora - is a corrupted by the leaders. 2) The gospel - Is also corrupted, It is taken on faith without any criticism of the text. 3) The quran - Is preserved and let the disbiliver bring forth one verse like Quran that can stand the all the test. the christian tried it and guess what they copied Quran. Shariah of Abram and all other prophet has been abrogated. The constant message of all the prophet is Pristine monothism of Islam. Note not the shariah. To state Shariah of the past generation is constant does not make sense as finality of prophethood was yet to manifest. Prophet Muhammad (SAW) was the final messanger and shariah has been finalised. Even Isah (AS) i.e Jesus (AS) will have to follow the Shariah brought down through Muhammad SAW. No other way is acceptable.