And so [i.e., in this way] all the Israelites will be saved. [Note: The "all" here is thought by many to refer to a large number of the physical Jews who will be saved, not necessarily to every single individual Jew]. Even as it is written [Isa. 59:20-21], "The Deliverer [i.e., Christ] will come from Zion [i.e., the city of Jerusalem, or from the nation of Israel]. He will take away the wickedness from Jacob [i.e., the Jews]."

But the heavenly Jerusalem [Heb. 12:22] consists of free people, and is the mother of us [Christians].

And I looked, and there in front of me was the Lamb, standing on Mount Zion, and with him were one hundred and forty-four thousand persons, with the Lamb's name and His Father's name written on their foreheads.

Of the

Pay attention, brothers, so that there will not be in any one of you an evil heart of unbelief, [resulting] in falling away from the living God.

how much more will the blood of Christ, who through the eternal Holy Spirit [or, His eternal Spirit] offered Himself without [moral] blemish to God, cleanse our consciences from deeds which lead to [spiritual] death to serve the living God?

It is a terrifying thing to fall into the hands of the living God.

And Simon Peter answered, "You are the Christ [i.e., God's specially chosen one], the Son of the living God."

[Hosea 1:10 says], "And it will happen that in the very place where people were told, 'You people do not belong to me [i.e., God],' they will be called children of the living God."

For those people themselves report on what kind of a reception we had from you, and how you people turned to God from idols, to serve a living and true God.

And I saw another angel coming up from the east; he held the seal of the living God. [Note: This "seal" was a mark of identification or ownership]. And he called out with a loud voice to the four angels who had been given [the power] to harm the land and the ocean,

An innumerable

And it was also prophesied about [these] people by Enoch, the seventh [descendant] of Adam [Gen. 5:18-24], who said, "Look, the Lord came with thousands upon thousands [Note: The Greek uses the plural form of "myriad," which means 10,000] of His holy ones [i.e., angels],

Then I looked, and heard the voice of many angels surrounding the throne and the living beings and elders. They numbered in the tens of thousands, and thousands and thousands [more]. [Note: The Greek says "myriads of myriads"].

General references

For we do not have a lasting city here on earth [i.e., such as Jerusalem] but we are looking for the city to come [i.e., heaven. See 10:11].