To get a little historical context – the Temple was undergoing renovation when this hidden scroll (which we now know as the Book of Deuteronomy) was found by the high priest. We could wonder why such an important part of the Pentateuch, (the first five Books of the Bible) had gone missing… but we only have to look back on the fifty-seven years prior of immoral, corrupted, and evil rule by Manasseh and Amon to see how generations of Jews had simply forgotten God. In fact, when Shaphan brought the scroll to King Josiah, they both had no idea what it was or contained. But when the scroll was read to the young king, (the son and grandson of Amon and Manasseh) he immediately ordered its requirements to be observed and took active steps to clean up the mess his family had made…triggering an intensive reform in the worship and morals in the Jewish nation of Judah.