-During the days of Yoshiyahu a torah scroll was found open to the text pertaining to the destruction and exile of the nation. This led to a movement of mass repentant.
-Before Moshe died he wrote a torah scroll for every tribe he then made an additional one to be placed in the aron (gold ark).
-This torah scroll stayed there for 800 years until it was hidden to avoid destruction at the hands of King Amon.
-During the reign of Yeshiyahu this scroll was found by Chilkiyah the priest, prophesying destruction.
-Meaning the reason why it had such an effect was because it was this specific torah.