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.

Generally, doors in the Bible represent the initial desires for good and concepts of truth that introduce us to new levels of love and understanding, and even to the Lord Himself. Since a “house” represents a person’s desires, affections and passions, the door serves to introduce true ideas that can put those desires into action.

In John 10:7, the door signifies the Lord, who is good itself and truth itself. (Arcana Coelestia 2356[2])

In Revelation 3:8; 4:1, the door signifies admission to the arcana of heaven revealed. (Apocalypse Explained 260[2])

The meaning depends on context, of course. For example, references to doorposts and lintels are making a distinction between introductory goods and introductory truths. And, in Sodom, Lot's house had two doors -- an inner one and an outer one. When, in Genesis 19:6, Lot tried to convince the men of Sodom not to attack the angels visiting him, he went outside the inner door, but stayed inside the outer door. There, the outer door represents a desire for good that is resistant to the falsity represented by the men of Sodom; the inner door represents true ideas springing from that desire for good. Someone nurturing a desire for good could be admitted through the first door, but would have to learn the truth about how to express that desire before being admitted through the second.

(Odkazy: Genesis 19)