But the high places were not removed: nevertheless Asa's heart was perfect with the LORD all his days.
Read Chapter 15
George Leo Haydock
The high places. There were excelsa, or high places, of two different kinds. Some were set up and dedicated to the worship of idols, or strange gods: and these Asa removed, 2 Paralipomenon xiv. 2. Others were only altars of the true God, but were erected contrary to the law, which allowed of no sacrifices but in the temple; and these were not removed by Asa. (Challoner)
They had been built before the temple, and tolerated by the prophets; (Calmet) and, though they were now improper for sacrifices, (Haydock) Asa thought it would be imprudent to molest them, (Calmet) as perhaps he could not take them away. (Du Hamel)
He left also the ruins of (Haydock) the temples built by Solomon, (Worthington) on Mount Olivet, (4 Kings xxiii.; Menochius) as no longer dangerous. (Salien)
Lord. Asa had his faults; but never forsook the worship of the Lord. (Challoner)
In the same sense, David is so often praised as a just prince. Asa threw a prophet into prison, and placed his trust as much in physic...
Regarding many kings of the line of David, we read that they were saved not through their own merit but through the virtues of their father, David, who did that which was pleasing in the sight of God. And we come to Asa, the king of Judah, of whom it is written: “Asa did that which was right in the sight of the Lord, as did David, his father.” And after a lengthy account of his many virtues, the story is concluded with these words: “But the high places he did not take away. Nevertheless, the heart of Asa was perfect with God all the days of his life.” You see that he, too, is referred to as just, and his heart, indeed, was perfect with God, and yet he erred in that he did not take away the high places, as, we read, Hezekiah and Josiah had done. - "Against the Pelagians 2.21"
The high places: There were excelsa or high places of two different kinds. Some were set up, and dedicated to the worship of idols, or strange gods; and these Asa removed, 2 Par. 14. 2; others were only altars of the true God, but were erected contrary to the law, which allowed of no sacrifices but in the temple; and these were not removed by Asa.-- Ibid.