Joash, Amaziah, and Uzziah all started out well but later hardened their hearts. They all rejected God's Word and refused to repent. God wanted them to return to Him, but their intransigence forced His hand.
Is God hard? Is He austere and unmerciful? Does God owe us salvation and eternal life? Is He bound to give us blessings regardless of our conduct, despite the direction of our lives? No, our choices decide our fate (see Ezekiel 18:23-28).
God demands individual responsibility. He never condones sin nor grants license for anyone to disobey His commands. The subject here is not about transgressions done out of weakness or ignorance but those committed as a way of life with knowledge of wrongdoing. He judges such sins seriously. Yet, even for such sins, God always desires and allows the sinner to repent.
As we see in the examples of these kings, He will always chase after the sinner with His Word and allow him time to repent. He always leaves the door open for a sinner who will return to Him. But eventually, the mind becomes set (Ecclesiastes 8:11), the conscience becomes seared (I Timothy 4:2), and repentance becomes impossible.
At some point, a sinner will no longer change, and God says that He then makes a final judgment. He tells Moses after he had offered his own life for the sins of Israel, “Whoever has sinned against Me, I will blot him out of My book” (Exodus 32:33). God enters names into the Book of Life, and He has the prerogative to erase names from it as well—a sobering thought indeed.
Essentially, Joash, Amaziah, and Uzziah all quoted Deuteronomy 29:19: “I shall have peace, even though I walk in the imagination [dictates] of my heart.” At a certain point, confronted with their sins, they said, “I will not repent, I will not listen to God's prophets. I will continue in the direction I am going, and despite that, I will live in peace and prosperity.” God says that is the kind of thinking He expects from a drunk: “I can continue to drink and not get become impaired.”
In verse 20, Moses reaches a scary conclusion about how God would deal with such a person at that point:
The LORD would not spare him; for then the anger of the LORD and His jealousy would burn against that man, and every curse that is written in this book would settle on him, and the LORD would blot out his name from under heaven.
Through Moses, God is saying, “Do not kid yourself. You cannot live in violation of My ways and expect Me not to respond.” Most of us have come out of a Protestant society that teaches that God is essentially obligated to give us salvation because of the depth of His grace. Protestant theology proclaims that His mercy is so great that, as long as we have accepted the blood of Jesus Christ, salvation is assured. This claim is not true. While this teaching tickles people's ears, they forget that God's justice perfectly balances His mercy, and His love tempers both.
He knows that anybody who desires to live in a way opposed to His way of life would be miserable for all eternity should he inherit the Kingdom of God. God's sense of justice will not allow Him to give eternal life to such a person. He will not commit a person to that depth of misery, nor will He allow him to cause suffering for others. Like Satan, he would be a thorn in the side of the godly. If God determines that it would not be good for someone to live in His Kingdom, because he refuses to live as God requires, he will not be there.
