919. 21:23 The city had no need of the sun or of the moon to shine in it, for the glory of God illuminated it, and the Lamb is its lamp. This symbolically means that people of the New Church will not be caught up in self-love and their own intelligence and so possess a natural sight only, but from the Word's Divine truth will possess a spiritual light from the Lord alone.

The sun here symbolizes natural love divorced from spiritual love, which is self-love. And the moon symbolizes a natural intelligence and faith divorced from a spiritual intelligence and faith, which is one's native intelligence and a self-made faith. This is the love and the intelligence and faith symbolized by the sun and moon here, which people of the Lord's New Church will have no need of to light their sight.

The glory of God which illumines the city symbolizes the Word's Divine truth (no. 629), and because that illumination or enlightenment comes from the Lord, we are told as well that the Lamb is its lamp.

The symbolism here is similar to that found in the following verses in Isaiah:

You shall call your walls salvation, and your gates praise. The sun shall no longer be your light by day, nor for brightness shall the moon give light to you; but Jehovah will be to you an everlasting light, and your God your glory. Your sun shall no longer go down, nor shall your moon wane; for Jehovah will be your everlasting light... Your people shall all be righteous. (Isaiah 60:18-21)

The sun and moon that will no longer give light mean self-love and one's native intelligence. And the sun and moon that will no longer go down mean love from the Lord for the Lord, and an intelligence and faith from Him. That Jehovah will be an everlasting light has the same symbolic meaning as what is said here, that the glory of God will illumine the city and the Lamb be its lamp.

That the sun symbolizes love for the Lord, and in an opposite sense self-love, may be seen in nos. 53 and 414 above. And that the moon symbolizes intelligence from the Lord and faith from Him, in nos. 332, 413, 414. Thus the moon in an opposite sense symbolizes one's native intelligence and a self-made faith.

Since the sun in an opposite sense symbolizes self-love, and the moon one's native intelligence and a self-made faith, therefore it was an abomination to worship the sun, moon and stars, as may be seen in Jeremiah 8:1-2.

331. And behold, there was a great earthquake. This symbolizes the state of the church among those people completely changed, and their terror.

Earthquakes symbolize changes in the state of the church because the earth symbolizes the church (no. 285), and because in the spiritual world, when the state of the church is corrupted somewhere and a change is made, an earthquake occurs. And because this presages the people's destruction, they are in terror. For lands in the spiritual world are in appearance like lands in the natural world (no. 260). But because lands there, like everything else in that world, have a spiritual origin, therefore those lands change in accordance with the state of the church among the inhabitants upon them, and when the state of the church is corrupted, the lands tremble and quake, even sinking down and being moved from their location.

That this is what happened when the Last Judgment was imminent and taking place may be seen in the short work, The Last Judgment.

It can be seen from this what quakes, shakings and removals of the earth symbolize in the following places:

...there will be pestilences, famines, and earthquakes in various places. (Matthew 24:7, cf. Mark 13:8, Luke 21:11)

(These things are said there of the Last Judgment.)

...in the fire of My wrath I have spoken, if in that day there is not a great earthquake... so that... every person on the face of the earth shakes... and the mountains are overthrown... (Ezekiel 38:18-20).

...there was a great earthquake, such as had not occurred since people came on the earth. (Revelation 16:18)

...I will shake the heavens, and the earth will be moved out of her place, in the wrath of Jehovah of hosts... (Isaiah 13:13)

...the foundations of the earth are shaken... The earth is shaken exceedingly...(because) its transgression is heavy upon it... (Isaiah 24:18-20)

The earth shook and quaked, and the foundations of the hills..., because He was angry. (Psalms 18:7)

The mountains quake before (Jehovah)...and the rocks are overthrown... (Nahum 1:5-6)

So likewise in other places, as in Jeremiah 10:10; 49:21, Joel 2:10, Haggai 2:6-7, Revelation 11:19, and elsewhere.

These things, however, must be understood as taking place in the spiritual world, and not in the natural world. In the natural world they symbolize such things as stated above.