Arcana Coelestia #21
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.
John 1:1-8
1
In the beginning was the Word, and the Word was with God, and the Word was God.
2
The same was in the beginning with God.
3
All things were made through him. Without him was not anything made that has been made.
4
In him was life, and the life was the light of men.
5
The light shines in the darkness, and the darkness hasn't overcome it.
6
There came a man, sent from God, whose name was John.
7
The same came as a witness, that he might testify about the light, that all might believe through him.
8
He was not the light, but was sent that he might testify about the light.