21. Verses 4-5 And God saw that the light was good; and God made a distinction between the light and the darkness. And God called the light Day, and the darkness He called Night.

The light is called good, because it comes from the Lord, who is good itself. 'The darkness' is those things which were there prior to the person's new conception and birth. They were seen as light, because evil was seen as good, and falsity as truth. But in reality they are darkness and things proper to that person which are lingering on. All things that are the Lord's, being things of light, are compared to the day, and all that are man's own, being those of thick darkness, are compared to the night, as is done many times in the Word.

In Leviticus 11:28, the body signifies vileness. (Apocalypse Explained 79)

In Matthew 24:28, it signifies the church devoid of the life of charity and faith. (Arcana Coelestia 3900[10])

In Nahum 3:3, this signifies that evils and the people who commit evils are innumerable. (Arcana Coelestia 6978)

(References: Apocalypse Explained 1081; Deuteronomy 21:23; Matthew 6:22)