Passage
But there shall be no more gloom for her who was in anguish. In the former time, he brought into contempt the land of Zebulun and the land of Naphtali; but in the latter time he has made it glorious, by the way of the sea, beyond the Jordan, Galilee of the nations.
Nearby Context
Isaiah 9:1 But there shall be no more gloom for her who was in anguish. In the former time, he brought into contempt the land of Zebulun and the land of Naphtali; but in the latter time he has made it glorious, by the way of the sea, beyond the Jordan, Galilee of the nations.
Isaiah 9:2 The people who walked in darkness have seen a great light. Those who lived in the land of the shadow of death, on them the light has shined.
Isaiah 9:3 You have multiplied the nation. You have increased their joy. They rejoice before you according to the joy in harvest, as men rejoice when they divide the plunder.
Study Lenses
The verse centers on "shall", "gloom", "anguish", "former", "time", "brought", "contempt", and "land". It is saying that the verse draws attention to "shall" and "gloom", so its meaning should be read from those terms before moving to application.
The next verse adds "The people who walked in darkness have...", so "shall" and "gloom" should be read forward into that movement. 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 "shall" and "gloom" with trust shaped by these words, not by a vague optimism outside the passage.