Of the increase of his government and of peace there shall be no end, on David’s throne, and on his kingdom, to establish it, and to uphold it with justice and with righteousness from that time on, even forever. The zeal of Yahweh of Armies will perform this.
Isaiah 9:5 For all the armor of the armed man in the noisy battle, and the garments rolled in blood, will be for burning, fuel for the fire.
Isaiah 9:6 For to us a child is born. To us a son is given; and the government will be on his shoulders. His name will be called Wonderful, Counselor, Mighty God, Everlasting Father, Prince of Peace.
Isaiah 9:7 Of the increase of his government and of peace there shall be no end, on David’s throne, and on his kingdom, to establish it, and to uphold it with justice and with righteousness from that time on, even forever. The zeal of Yahweh of Armies will perform this.
Isaiah 9:8 The Lord sent a word into Jacob, and it falls on Israel.
Isaiah 9:9 All the people will know, including Ephraim and the inhabitants of Samaria, who say in pride and in arrogance of heart,
The verse centers on "increase", "government", "peace", "shall", "david", "throne", "kingdom", and "establish". It is saying that the verse draws attention to "increase" and "government", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 6's "For to us a child is born..." into verse 8's "The Lord sent a word into Jacob...", so "increase" and "government" belong inside that flow. In Isaiah context, the local focus is the Holy One of Israel, judgment and restoration, the servant of the LORD, and Zion's hope.
A plain takeaway is to answer the verse's own emphasis on "increase" and "government" with trust shaped by these words, not by a vague optimism outside the passage.