Both to the genealogy of the priests by the house of their fathers, and the Levites from twenty years old and upward, in their charges by their courses;2 Chronicles 31:17 Parallel Commentaries

Hezekiah
In sharp contrast with the reckless rule of Ahaz was the reformation wrought during the prosperous reign of his son. Hezekiah came to the throne determined to do all in his power to save Judah from the fate that was overtaking the northern kingdom. The messages of the prophets offered no encouragement to halfway measures. Only by most decided reformation could be threatened judgments be averted. In the crisis, Hezekiah proved to be a man of opportunity. No sooner had he ascended the throne than he …
Ellen Gould White—The Story of Prophets and Kings

The Whole Heart
LET me give the principal passages in which the words "the whole heart," "all the heart," are used. A careful study of them will show how wholehearted love and service is what God has always asked, because He can, in the very nature of things, ask nothing less. The prayerful and believing acceptance of the words will waken the assurance that such wholehearted love and service is exactly the blessing the New Covenant was meant to make possible. That assurance will prepare us for turning to the Omnipotence …
Andrew Murray—The Two Covenants