For in the eighth year of his reign, while he was yet {b} young, he began to seek after the God of David his father: and in the twelfth year he began to purge Judah and Jerusalem from the high places, and the groves, and the carved images, and the molten images.

(b) When he was but sixteen years old he showed himself zealous of God's glory, and at twenty years old he abolished idolatry and restored the true religion.

Wesley's Notes

34:3 Young - ln the sixteenth year of his age; when he was entering into the age of temptation, and had the administration of his kingdom wholly in his own power, and none to restrain him; even then he begins to be religious in good earnest.

Scofield Reference Notes

Margin groves

See Scofield Note: "Dt 16:21" See Scofield Note: "Jud 3:7".

Jamieson-Fausset-Brown Bible Commentary

2Ch 34:3-7. He Destroys Idolatry.

3. in the eighth year of his reign-This was the sixteenth year of his age, and, as the kings of Judah were considered minors till they had completed their thirteenth year, it was three years after he had attained majority. He had very early manifested the piety and excellent dispositions of his character. In the twelfth year of his reign, but the twentieth of his age, he began to take a lively interest in the purgation of his kingdom from all the monuments of idolatry which, in his father's short reign, had been erected. At a later period, his increasing zeal for securing the purity of divine worship led him to superintend the work of demolition in various parts of his dominion. The course of the narrative in this passage is somewhat different from that followed in the Book of Kings. For the historian, having made allusion to the early manifestation of Josiah's zeal, goes on with a full detail of all the measures this good king adopted for the extirpation of idolatry; whereas the author of the Book of Kings sets out with the cleansing of the temple, immediately previous to the celebration of the passover, and embraces that occasion to give a general description of Josiah's policy for freeing the land from idolatrous pollution. The exact chronological order is not followed either in Kings or Chronicles. But it is clearly recorded in both that the abolition of idolatry began in the twelfth and was completed in the eighteenth year of Josiah's reign. Notwithstanding Josiah's undoubted sincerity and zeal and the people's apparent compliance with the king's orders, he could not extinguish a strongly rooted attachment to idolatries introduced in the early part of Manasseh's reign. This latent predilection appears unmistakably developed in the subsequent reigns, and the divine decree for the removal of Judah, as well as Israel, into captivity was irrevocably passed.

Matthew Henry's Concise Commentary

34:1-33 Josiah's good reign in Judah. - As the years of infancy cannot be useful to our fellow-creatures, our earliest youth should be dedicated to God, that we may not waste any of the remaining short space of life. Happy and wise are those who seek the Lord and prepare for usefulness at an early age, when others are pursuing sinful pleasures, contracting bad habits, and forming ruinous connexions. Who can express the anguish prevented by early piety, and its blessed effects? Diligent self-examination and watchfulness will convince us of the deceitfulness and wickedness of our own hearts, and the sinfulness of our lives. We are here encouraged to humble ourselves before God, and to seek unto him, as Josiah did. And believers are here taught, not to fear death, but to welcome it, when it takes them away from the evil to come. Nothing hastens the ruin of a people, nor ripens them for it, more than their disregard of the attempts made for their reformation. Be not deceived, God is not mocked. The current and tide of affections only turns at the command of Him who raises up those that are dead in trespasses and sins. We behold peculiar loveliness, in the grace the Lord bestows on those, who in tender years seek to know and to love the Saviour. Hath Jesus, the Day-spring from on high, visited you? Can you trace your knowledge of this light and life of man, like Josiah, from your youth? Oh the unspeakable happiness of becoming acquainted with Jesus from our earliest years!