We’re in the middle of Isaiah’s judgments against the nations:

• Babylon (Isaiah 14.3 – 23, 21.1 – 17)
• Assyria (Isaiah 14.24 – 27)
• Philistia (14.28 – 32)
• Moab (Isaiah 15.1 – 16.13)
• Damascus (17.1 – 14)
• Cush (Isaiah 18.1 – 7, 20.1 – 6)
• Egypt (Isaiah 19.1 – 15, 20.1 – 6)
• Jerusalem (Isaiah 22.1 – 25)
• Tyre and Sidon (Isaiah 23.1 – 18)
• “The earth” (Isaiah 24.1 – 23)

Isaiah 19.1 – 15 is judgment on Egypt, followed by a graphic prediction of that judgment in Isaiah 20:

Then the LORD said, “As my servant Isaiah has walked naked and barefoot for three years as a sign and a portent against Egypt and Cush, so shall the king of Assyria lead away the Egyptian captives and the Cushite exiles, both the young and the old, naked and barefoot, with buttocks uncovered, the nakedness of Egypt. (Isaiah 20.3, 4, ESV)

But in between is this startling prediction:

In that day there will be an altar to the LORD in the midst of the land of Egypt, and a pillar to the LORD at its border. It will be a sign and a witness to the LORD of hosts in the land of Egypt. When they cry to the LORD because of oppressors, he will send them a savior and defender, and deliver them. And the LORD will make himself known to the Egyptians, and the Egyptians will know the LORD in that day and worship with sacrifice and offering, and they will make vows to the LORD and perform them. And the LORD will strike Egypt, striking and healing, and they will return to the LORD, and he will listen to their pleas for mercy and heal them.

In that day there will be a highway from Egypt to Assyria, and Assyria will come into Egypt, and Egypt into Assyria, and the Egyptians will worship with the Assyrians. In that day Israel will be the third with Egypt and Assyria, a blessing in the midst of the earth, whom the LORD of hosts has blessed, saying, “Blessed be Egypt my people, and Assyria the work of my hands, and Israel my inheritance.” (Isaiah 19.19 – 25, ESV)

When? “In that day.” What day? Some think the Millennium suggested by Revelation 20.1 – 4 . Or the new earth of Revelation 21.1 – 4. Or some time before? We really don’t know the when.

But we do know the how: “The LORD will make himself known to the Egyptians…and they will return to the LORD…”

What’s the lesson? Maybe we need to learn that there are no permanent categories. Any person or nation can turn to the LORD. For that matter, any person or nation can turn away from the LORD as the US appears to be doing now.

Saul of Tarsus is a positive example:

And I was still unknown in person to the churches of Judea that are in Christ. They only were hearing it said, “He who used to persecute us is now preaching the faith he once tried to destroy.” And they glorified God because of me. (Galatians 1.22 – 24, ESV)

Demas, a negative example:

For Demas, in love with this present world, has deserted me and gone to Thessalonica… (1 Timothy 4.10, ESV)

And at the end?

After this I looked, and behold, a great multitude that no one could number, from every nation, from all tribes and peoples and languages, standing before the throne and before the Lamb, clothed in white robes, with palm branches in their hands, and crying out with a loud voice, “Salvation belongs to our God who sits on the throne, and to the Lamb!” (Revelation 7.9, 10, ESV)