Apocalypse Explained #611
611. But in the days of the voice of the seventh angel, when he is about to sound.- That this signifies the last state of the church, and then revelation of Divine Truth, is evident from the signification of the days of the voice of the seventh angel, as denoting the last state of the church; for the progressive changes of the state of the church are described by the sounding of the seven angels, therefore the voice of the seventh angel signifies the last state; and from the signification of, when he is about to sound, as denoting revelation then of Divine Truth. That by sounding a trumpet or horn is signified the influx of Divine Truth, and its revelation, may be seen above (n. 502). That its revelation is here signified, is evident from the following part of this verse, where it is said, "And the mystery of God shall be consummated, as he hath declared in good tidings to his servants the prophets." This signifies that the prediction concerning the coming of the Lord shall then be fulfilled. With the coming of the Lord there is also revelation of Divine Truth.
Nation
'A nation,' as in Genesis 21:18, signifies the spiritual church which should receive the good of faith.
In Isaiah 1:4, this signifies evils of the will, or lusts, while people signify falsities of the understanding, or persuasions. (Arcana Coelestia 622)
In Psalm 106:5, this signifies the Lord's kingdom. (Arcana Coelestia 1416[5])
In Ezekiel 29:15, this signifies the gentiles who will no longer be under the dominion of external truths. (Arcana Coelestia 409, 410)
In Micah 7:16, this signifies people who trust in themselves. (Arcana Coelestia 249)
(References: Arcana Coelestia 2699; Jeremiah 5, 5:17, Jeremiah 17)