FROM: GotQuestions.org
“government” in Isaiah 9:6 means “dominion, power, or sovereignty through legal authority.”
“government and its peace will never end. He will rule with fairness and justice from the throne of his ancestor David for all eternity” — “kingdom there will be no end”
“All authority in heaven and on earth has been given to me {Jesus Christ}” (Matthew 28:18). As the supreme ruler of God’s heavenly kingdom, Jesus Christ “must reign until he has put all his enemies under his feet” (1 Corinthians 15:25).
According to the Bible, particularly in 1 Corinthians 15:24-28, Jesus will eventually subdue all his enemies, including death, and then hand over his kingdom to God the Father, signifying that God will be the ultimate ruler of all things once everything is under Christ’s control; essentially, Jesus will relinquish his reign to fully establish God’s dominion over all creation.
28 And when all things shall be subdued unto him, then shall the Son also himself be subject unto him that put all things under him, that God Almighty [Father] may be all in all. Jesus Christ will be King of Kings for ever under God Almighty.
2 Peter 1:11
and you will receive a rich welcome into the eternal kingdom of our Lord and Savior Jesus Christ.
Isa 9:7
Of the greatness of his government and peace there will be no end. He will reign on David’s throne and over his kingdom, establishing and upholding it with justice and righteousness from that time on and forever.
The zeal of the Lord Almighty will accomplish this.
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Jesus Christ had the divine government—the dominion, power, and authority of the kingdom of heaven—on His shoulders when He bore the cross for our sins (1 Corinthians 1:18; Colossians 2:14; 1 Peter 2:24). For it was by this act that He conquered sin, death, hell, and the devil (John 16:33; Acts 2:24; Romans 6:9–10; 1 Corinthians 15:24–25, 54–57; 1 John 3:8; 2 Timothy 1:10). The apostle Paul acknowledges that Jesus is “the head over every ruler and authority” (Colossians 2:10, NLT).
Jesus Christ ushered in a glorious new day for all humanity when the King “humbled himself in obedience to God and died a criminal’s death on a cross. Therefore, God elevated him to the place of highest honor and gave him the name above all other names, that at the name of Jesus every knee should bow, in heaven and on earth and under the earth, and every tongue declare that Jesus Christ is Lord, to the glory of God the Father” (Philippians 2:8–11, NLT).
Now He “is seated at the right hand of the throne of God” (Hebrews 12:2, ESV). The highest government in all creation with power to exercise absolute dominion over every being in heaven and on earth will be on His shoulders for all eternity (Psalm 146:10). He is the King of Kings and Lord of Lords (Revelation 17:14; 19:16).