What does Isaiah 9:7 mean?
The prophet has described a man and king who will come and restore Israel from darkness to light and abundance and peace (Isaiah 9:1–3). Through his narration, this king is clearly more than just a man. Isaiah has called him both Mighty God and Everlasting Father (Isaiah 9:6).There can be no mistake, this will be no mere mortal. His government and the peace that it brings will never end, as would happen with the death of even an extraordinary monarch. This king will occupy the throne of David to the end of time. He will be king of Israel and the world forever. This could only be true of an eternal being. Finally, this coming king will be good and will never become corrupt. He will rule with justice and righteousness.
All of this will be brought about by the enthusiasm of the Lord of hosts. In other words, God will accomplish this because He wants to do it. It is His plan and purpose, and He will bring it about by His power. This is Israel's great future.
Believers understand clearly that this coming king of Israel is Jesus the Messiah. Many passages of Scripture support this. Possibly the most direct one is found in the words of the angel Gabriel to a young virgin named Mary. "You will conceive in your womb and bear a son, and you shall call his name Jesus. He will be great and will be called the Son of the Most High. And the Lord God will give to him the throne of his father David, and he will reign over the house of Jacob forever, and of his kingdom there will be no end" (Luke 1:31–33).