v1-2: The summary of Josiah's reign.
v3-7: Josiah's deep love for God, which was evident from his youngest years. Such love is jealous, and cannot tolerate rivals, so Josiah worked to rid the land of idolatry. If we are true worshipers of God, we will not tolerate opposing attitudes and loves in our own lives.
The purging of the land was thorough, extensive, ruthless; Josiah shared God's intolerance for sin. He even went beyond the borders of Judah into parts of Israel; see 31.1, where many who had joined with Hezekiah returned to these areas destroying idols. It does seem that Josiah actually travelled further north, as far as Naphtali.
v8: After 6 years the land had been purged; this indicates that there was much to be done.
v9-11: The temple was repaired, also 32.5; 33.14. It is both significant and sad that the damage was largely inflicted by the kings of Judah. Again we see that inner conflict is more damaging than attacks from outside.
v12-13: Men gifted in music were involved in supervising manual work; on occasion we do need to turn our hand to work outside our gifting. Josiah had the benefit of the support of significant numbers of Levites.
v14-18: Shaphan reported to Josiah how the work was progressing. He also brought in the copy of the book of the law, which had been found. Although, to this point, Josiah had not had access to the written Word of the Lord, that word was evidently written on his heart, for he had sought the Lord from his early years, and acted to remove idolatry from the land.
v19-21: Josiah's reaction to the reading of the law of God. He was made more conscious of the sins of the people, even though he had done much to purge the land. God's word revealed the guilt of the nation, and the expectation that wrath would fall.
v22: Josiah sought the mind of the Lord through the prophetess Huldah.
v23-25: The first part of Huldah's message was the inevitability of judgment. The nation had departed from the Living God, and had pursued idolatry. Judgment was therefore guaranteed.
v26-28: The Lord God will never treat the righteous and wicked alike (see Gen 18.25). Thus, God honoured the attitude shown by Josiah. He had humbled himself, torn his clothes with sorrow, when he heard the word of God. It seems, however, that judgment was now inevitable, following the reign of Manasseh. Josiah’s faithfulness would only defer the coming of that judgment.
v29-31: Josiah gathered the elders and all the people. He had the Book of the Covenant read to them, to encourage their obedience. He renewed the covenant, committing himself, and the people to follow the Lord. Unless they continued in obedience to God, the promised judgments would fall on the nation.
v32-33: Josiah made all who were present to obey the Lord God and to serve Him. Certainly they did this during his lifetime. Sadly, after Josiah died they soon departed from the Lord God.
It may have been that the influence of Manasseh was not fully removed from their hearts, and that they did not really share Josiah's devotion. Certainly we see the fickleness of the human heart. Once Josiah had died (35.24), the restraint on their sin was removed, and they quickly returned to idolatry.