1 Kings 15:14 - Wesley's Explanatory Notes

High places — 2 Chronicles 14:3. He took away the altars of the strange gods, and the high places where they were worshipped: but as for those high places where the true God was worshipped he did not take them away; partly, because he thought there was no great evil in them, which had been used by David and Solomon, and other good men; partly, because he thought the removal of them might do more hurt than their continuance, by occasioning the total neglect of God's worship by many of the people, who either could not, or, through want of faith and zeal, would not go up to Jerusalem to worship, now especially, when the Israelites, formerly their friends, were become their enemies, and watched all opportunities to invade or molest them. Was perfect — That is, he sincerely and constantly adhered to the worship of God. Though he could not hinder the people from using the high places, yet he entirely devoted himself to the worship of God in the manner and place prescribed by him.