V.1-3 The Lord sends His messenger with a serious warning to those who were gathering in a false center at Bethel. When you have read these 3 verses, turn to 2 Kings 23:16-18, to see that what is said here was carried out there about 350 years later!
V.4 The king was out of his place in being at an altar. Those who are in a wrong place of worship today also lose their discernment of what God requires. The king is angry, and immediately God causes his arm to be withered.
V.6 Godly kindness to one who did not deserve this mercy.
V.7-10 A real test for the man of God after he had performed this miracle on the disobedient and rebellious king.