Translation: ESV
Ah, land of whirring wings that is beyond the rivers of Cush,
Depending on diplomatic alliances with powerful nations is futile; true security lies with God.
▸This is an oracle concerning Cush (Ethiopia).
This is an oracle concerning Cush (Ethiopia). 'Whirring wings' indicates there were many flying insects in this region. Ethiopia was connected to the 25th Dynasty, which ruled Egypt in Isaiah's time.
which sends ambassadors by the sea, in vessels of papyrus on the waters! Go, you swift messengers, to a nation tall and smooth, to a people feared near and far, a nation mighty and conquering, whose land the rivers divide.
Rather than trusting in diplomatic alliances with powerful nations, one should wait for God's guidance.
▸This is the scene of Ethiopian ambassadors coming to Israel and returning.
All you inhabitants of the world, you who dwell on the earth, when a signal is raised on the mountains, look! When a trumpet is blown, hear!
God's historical action is an event that the whole world must witness, and this reveals God's universal sovereignty.
▸This is God's declaration to the whole world.
For thus the LORD said to me: "I will quietly look from my dwelling like clear heat in sunshine, like a cloud of dew in the heat of harvest."
Even when God appears to be silent, he is actually watching everything and acts at the right time.
▸God quietly observes from his dwelling.
For before the harvest, when the blossom is over, and the flower becomes a ripening grape, he cuts off the shoots with pruning hooks, and the spreading branches he lops off and clears away.
God's judgment can come at the most unexpected moment—precisely when one looks the strongest.
▸Cutting branches just before harvest, when everything looks best, indicates judgment at an unexpected moment.
They shall all of them be left to the birds of prey of the mountains and to the beasts of the earth. And the birds of prey will summer on them, and all the beasts of the earth will winter on them.
Those defeated before God's judgment become food for birds of prey and wild beasts—this is the wretched reality of judgment.
▸The cut branches—the judged Ethiopian army—become food for birds of prey and wild beasts.
At that time tribute will be brought to the LORD of hosts from a people tall and smooth, from a people feared near and far, a nation mighty and conquering, whose land the rivers divide, to Mount Zion, the place of the name of the LORD of hosts.
The ultimate purpose of God's judgment is for the nations to come to Zion and bring tribute to God—this is Isaiah's vision of salvation.
▸This is the conclusion of the chapter.