“In the first year of his reign, in the first month, he opened the doors of the house of the LORD and repaired them” (v3). Despite that his father Ahaz had been one of the wickedest kings of Judah, Hezekiah began his reign with a heart ready to serve God. He ordered the neglected Temple to be cleansed and opened and commanded the Levites to “carry out the filth” (v5). Then he led everyone in a fresh consecration to the Lord, repenting, renouncing sin, and worshiping together (v28-31).
“All who were of a willing heart brought offerings” (v31). Real repentance and fresh dedication to the Lord can’t be commanded; our “willing hearts” must desire to know God.