Before him there was no king like him who turned to the Lord with all his heart and with all his soul and with all his might, according to all the law of Moses; nor did any like him arise after him. (2 Kings.23:25, NASB)
The verse above talks about King Josiah. He was a good king. The Bible describes him as doing good in the eyes of the Lord. He was SO good, in fact, that “Before him there was no king like him who turned to the Lord with all his heart and with all his soul and with all his might, according to all the law of Moses.” That includes his ancestor, King David, who is described as being wholehearted for God!
King Josiah had to undo a whole lot of what his father and grandfather, who were both wicked, did. He did away with the idols the people worshiped. He killed all the priests of the idols. Josiah ordered the Levites to repair the Temple. While there, one of the priests discovered a Book of the Law of Moses. He brought and read the book to the king. Josiah tore his robe in mourning, realizing how far Judah had strayed from the Lord, and how much work he would have to do to get the people back to Him!
https://en.wikipedia.org/wiki/Josiah.
We’re called to love the Lord our God with all of our hearts, souls, and might. Jesus repeated this command, and said that it is the best that we can do, in addition to loving our neighbors as ourselves. King Josiah acted so. As a result, God postponed the destruction and exile of the Kingdom of Judah until long after Josiah’s reign.
We should follow King Josiah’s example, to love God with all our being. It’s good practice for those of us who love Jesus, and who will spend eternity with Him in heaven!