The 'sun' in the Word, when referring to the Lord, signifies His divine love and wisdom. Because the sun represents the Lord, with respect to His divine love wisdom, since ancient times even to the present day, worship is done and temples are built facing the rising sun. The sun signifies celestial and spiritual love and also the Lord regarding His divine love, and so the good of love from Him. In the opposite sense, it signifies a denial of the Lord's divinity, and so adulteration of the good of love.

In Genesis 15:12, 19:23, this signifies the time and state before consummation; for the sun signifies the Lord, and the celestial things of love and charity; so its setting represents the last time of the church. Its rising signifies a coming of the Lord, and the first period of a new church. (Arcana Coelestia 1837, 1859)

In Jeremiah 8:1, this signifies self-love and its lusts. (Arcana Coelestia 2441)

In Revelation 12:1, this signifies love. (Arcana Coelestia 253, Arcana Coelestia 3272[2])

Sun signifies the good of love. (Arcana Coelestia 4918[3]）

(Odkazy: Apocalypse Explained 709)

1530. The truth of this could be proved to anyone from the Word, for example, when the Lord revealed Himself to Peter, James, and John, for His face at that time shone like the sun and His garments became white as the light, Matthew 17:2. The sole reason why He appeared to them in this way was that their interior sight had been opened. The same is also confirmed from the Prophets, as in Isaiah when reference is being made to the Lord's kingdom in heaven,

The light of the moon will be as the light of the sun, and the light of the sun will be sevenfold, as the light of seven days. Isaiah 30:26.

And in John, where reference is being made to the Lord's kingdom which is called the New Jerusalem,

The city has no need of the sun or of the moon to shed light in it; for the glory of God gives it light, and its lamp is the Lamb. Revelation 21:23.

And elsewhere in the same book,

There will be no night there, nor do they need a lamp or light of the sun, for the Lord God gives them light. Revelation 22:5.

And in addition when the Lord appeared to Moses, Aaron, Nadab, Abihu, and the seventy elders, it is said that they saw the God of Israel under whose feet there was so to speak a paved work of sapphire stone, like the substance of the sky for clearness, Exodus 24:10. Because the Lord's celestial and spiritual appears before the external sight of the angels as the Sun and the Moon, 'the sun' in the Word therefore means what is celestial, and 'the moon' what is spiritual.