Three parts also mark this record of the later period of Asa's reign: his war with Baasha (vv. 1-6), Hanani's sermon (vv. 7-10), and the conclusion of his reign (vv. 11-14).
Asa's heart was right in that he consistently loved God. Nevertheless, like David, his obedience lapsed. He trusted in a foreign alliance and later in physicians more than in Yahweh. This resulted in defeat and death.
"Asa, then, has done a complete volte-face from his earlier faithfulness. It is as if we meet two altogether different Asas. He appeared first in the strength of God-reliance, now in the weakness of self-reliance."39
Rather than confessing his guilt Asa became angry and oppressed his own kingdom. It may have looked for a while as if Asa was the Son of David who would perfectly trust and obey God. Unfortunately he did not remain faithful.
"Just as the Chronicler inserted Azariah's sermon in 15:2-7 to interpret to his readers the positive period of Asa's reign, so here he draws out the lessons to be learned from his falling away."40
"There are some occasions in the Bible when a person's handling of some small matter is taken as an indication of his capacity to handle a large one (e.g. Matt. 25:21, 23; Jer. 12:5). Asa, however, having passed the sternest of tests first (by withstanding Zerah), fails a comparatively trivial one."41
Verse 9 is especially noteworthy (cf. Zech. 4:10). No problem can arise for God's people of which He is not aware and out of which He cannot deliver them if they commit themselves to Him fully (cf. Rom. 8:32).
Asa was one of Judah's best kings, but he failed as did all the rest.