What does 2 Chronicles 34:31 mean?

Standing by the pillar, the king made a promise in front of the Lord: he would follow the Lord, keep his commands, and do everything written in the book, with all his heart and soul. 2 Chronicles 34:31 - Modern Text Bible

(Josiah personally commits to living by God’s ways. He’s not just telling others what to do—he’s leading by example.)