3 He did what was right in the eyes of the Lord as David his father had done. 4 He had the high places taken away, and the stone pillars broken to bits, and the Asherah cut down; and the brass snake which Moses had made was crushed to powder at his order, because in those days the children of Israel had offerings burned before it, and he gave it the name Nehushtan.
Matthew Henry's Commentary on 2 Kings 18:3-4
Commentary on 2 Kings 18:1-8
(Read 2 Kings 18:1-8)
Hezekiah was a true son of David. Some others did that which was right, but not like David. Let us not suppose that when times and men are bad, they must needs grow worse and worse; that does not follow: after many bad kings, God raised one up like David himself. The brazen serpent had been carefully preserved, as a memorial of God's goodness to their fathers in the wilderness; but it was idle and wicked to burn incense to it. All helps to devotion, not warranted by the word of God, interrupt the exercise of faith; they always lead to superstition and other dangerous evils. Human nature perverts every thing of this kind. True faith needs not such aids; the word of God, daily thought upon and prayed over, is all the outward help we need.