Isaiah 18:1

(Verse 1) These things are according to Hebrew. Furthermore, according to the Seventy, the wings of the heretics lament, which fly like ships across the sea of this age, and they surpass the impiety of the Gentiles, whom Scripture now calls Ethiopians.

Someone might wonder and say to himself, "Why does the prophetic oracle addressed to Damascus now mention the land that is beyond the rivers of Ethiopia?" At certain times the Israelites foolishly abandoned God the Savior of all and fell into the error of worshiping many gods. Paying no heed whatsoever to the law given by Moses, they were chastised by God, at times through foes who rose up against them and at times by other catastrophes. Although they should have repented and been healed, ceased their wicked way, walked in the commandments and sought help from God, they made alliances with their neighbors, first with the kings in Damascus, then with those in Egypt. Not only this. They also embraced the gods of the nations that had come to their aid and wasted no time in emulating their ways. Hence the prophet now turns his attention to the Egyptians.The Israelites, in particular those living in Jerusalem, had approached the Egyptians and pleaded with them to become allies. They needed their support because they were being invaded by the Babylonians. As God says in the words of the prophet, "Woe to those who go down to Egypt for help, who trust in horses and chariots." The Egyptians were zealous in their devotion to idols. Therefore he calls them a people desperate and beaten down. Desperate because they did not know the one who is by nature truly God, beaten down because they had allowed their minds to become subject to the deceptions of demons, trodden down under their feet.

(Chapter XVIII, Verse 1.) Woe to the land with the sound of wings beyond the rivers of Ethiopia. The Hebrew word Selsel (), which Symmachus interpreted as noise, Theodotion as birds, and we translate as cymbal. Aquila translated bis umbram. But it should be known that umbra Sel () is said, but here the syllable itself is doubled. From which we can understand the saying: Woe to the land that promises help in the shadow of its wings. And as the Scripture says: Whoever dwells in the shelter of the Most High will rest in the shadow of the Almighty (Psalm XC, 1), for which it is written in Hebrew, He will dwell in the shadow of the Omnipotent: boasting to have the likeness of God herself, and in danger promises to aid others. But it signifies either No, the city of Egypt, which is now called Alexandria, or Egypt itself, in which Jerusalem has always relied on like a bruised reed, which, when broken, pierces the hand of the one leaning on it. And here is the most beautiful order: just as in the previous Vision the prophetic word threatened Damascus, that the ten tribes would have help in it, begging for the mercy of God; so now also the desolation of Egypt is proclaimed, for which the invocation of God has been neglected. For it is the land itself that is beyond the rivers of Ethiopia, that is, beyond the streams of the Nile river, which no one doubts flows from Ethiopia into Egypt. Egypt can be called the granary of the world because of the abundance of crops; indeed, the swift and rapid flight of birds produces the sound of a cymbal. Some interpret this as referring to the Roman Empire, which sends ambassadors to the sea and on papyrus vessels over the waters, and they relate all history to the times of Vespasian and Titus, during which Jerusalem was destroyed. […]

(Verse 1) I have placed both editions in the most obscure prophecy so that nothing may seem to be lacking to those who want to understand what is written.

The word of Isaiah: "Woe to the wings of the vessels of the land, beyond the rivers of Ethiopia: (woe to him) who sends sureties by the sea, and letters of papyrus [on the water; for nimble messengers will go] to a nation anxious and expectant, and a people strange and bitter against them; a nation hopeless and trodden down."But we who hope for the Son of God are persecuted and trodden down by those unbelievers. For the "wings of the vessels" are the churches; and the sea is the world, in which the church is set like a ship tossed in the deep but not destroyed. For she has with her the skilled pilot, Christ. And she bears in her midst also the trophy over death, for she carries with her the cross of the Lord. For her prow is the east, and her stern is the west, and her hold is the south, and her tillers are the two Testaments. And the ropes that stretch around her are the love of Christ, which binds the church. And the net which she bears with her is the layer of the regeneration which renews the believing from which also come these glories. As the wind, the Spirit from heaven is present by whom those who believe are sealed. She has also anchors of iron accompanying her, that is, the holy commandments of Christ himself, which are strong as iron. She also has mariners on the right and on the left, assessors like the holy angels by whom the church is always governed and defended. The ladder in her leading up to the sail-yard is an emblem of the passion of Christ, which brings the faithful to the ascent of heaven. And the topsails aloft on the yard are the company of prophets, martyrs and apostles, who have entered into their rest in the kingdom of Christ.