And he did evil, because he prepared not his heart to seek the LORD.

Wesley's Notes

12:14 Did evil - Or, settled not, although he humbled himself, for a season, yet he quickly relapsed into sin, because his heart was not right with God.

King James Translators' Notes

prepared: or, fixed

Matthew Henry's Concise Commentary

12:1-16 Rehoboam, forsaking the Lord, is punished. - When Rehoboam was so strong that he supposed he had nothing to fear from Jeroboam, he cast off his outward profession of godliness. It is very common, but very lamentable, that men, who in distress or danger, or near death, seem much engaged in seeking and serving God, throw aside all their religion when they have received a merciful deliverance. God quickly brought troubles upon Judah, to awaken the people to repentance, before their hearts were hardened. Thus it becomes us, when we are under the rebukes of Providence, to justify God, and to judge ourselves. If we have humbled hearts under humbling providences, the affliction has done its work; it shall be removed, or the property of it be altered. The more God's service is compared with other services, the more reasonable and easy it will appear. Are the laws of temperance thought hard? The effects of intemperance will be found much harder. The service of God is perfect liberty; the service of our lusts is complete slavery. Rehoboam was never rightly fixed in his religion. He never quite cast off God; yet he engaged not his heart to seek the Lord. See what his fault was; he did not serve the Lord, because he did not seek the Lord. He did not pray, as Solomon, for wisdom and grace; he did not consult the word of God, did not seek to that as his oracle, nor follow its directions. He made nothing of his religion, because he did not set his heart to it, nor ever came up to a steady resolution in it. He did evil, because he never was determined for good.

Matthew Henry's Whole Bible Commentary

Verses 13-16

The story of Rehoboam's reign is here concluded, much as the story of the other reigns concludes. Two things especially are observable here:-1. That he was at length pretty well fixed in his kingdom, v. 13. His fenced cities in Judah did not answer his expectation, so he now strengthened himself in Jerusalem, which he made it his business to fortify, and there he reigned seventeen years, in the city which the Lord had chosen to put his name there. This intimates his honour and privilege, that he had his royal seat in the holy city, which yet was but an aggravation of his impiety-near the temple, but far from God. Frequent skirmishes there were between his subjects and Jeroboam's, such as amounted to continual wars, (v. 15), but he held his own, and reigned, and, as it should seem, did not so grossly forsake the law of God as he had done (v. 1) in his fourth year. 2. That he was never rightly fixed in his religion, v. 14. He never quite cast off God; and yet in this he did evil, that he prepared not, he engaged not, his heart to seek the Lord. See what the fault is laid upon. (1.) He did not serve the Lord because he did not seek the Lord. He did not pray, as Solomon did, for wisdom and grace. If we prayed better, we should be every way better. Or he did not consult the word of God, did not seek to that as his oracle, nor take directions from it. (2.) He made nothing of his religion because he did not set his heart to it, never minded it with any closeness of application, and never any hearty disposition to it, nor ever came up to a steady resolution in it. What little goodness he had was transient and passed away like the morning cloud. He did evil because he was never determined for that which is good. Those are easily drawn by Satan to any evil who are wavering and inconstant in that which is good and are never persuaded to make religion their business.