These chapters tell of events that took place some years prior to the attack by Assyria. Isaiah placed them here to highlight the fact that the destruction of Judah may have been delayed but not halted. Hezekiah’s terminal illness caused him to utter a weak but effective prayer of repentance and sorrow over his sin. The Lord gave him a reprieve and he was healed. Sometime later, the King received ambassadors from Babylon, at that time a small kingdom trying to throw off the yoke of the Assyrians. They came seeking to stir up Judah to resist as well. The mistake Hezekiah made was to take pride in the treasures of the Temple and palace as if they were his own. He did not consult the Lord or Isaiah when he displayed them to the Babylonians. The Lord then revealed to the king that though Judah would not fall to Assyria, she would fall a century later to Babylon.
The lesson here is that the Lord often withholds judgment to spare the righteous but for other reasons as well, reasons which He is not obligated to disclose to us. The Lord keeps His own counsel. We know that His justice and His decisions will surely be carried out according to His plan. Therefore in every situation, in every crisis or dilemma we are to trust Him and seek His guidance so we can make godly choices.
Many people even believers fail to trust God. They choose people or idols or things that will prove false and lead then away from God. Many people (yes believers too!) put great faith and trust in the words of psychics, mediums, fortunetellers and media marketing gurus who tell people what they want to hear. In the long run such advice will lead them away from God into the arms of Satan.