1 Kings 15:14 - Joseph Benson’s Commentary on the Old and New Testaments

The high places were not removed 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. Asa's heart 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.