Apocalypse Explained # 432
432. Verse 5. Of the tribe of Judah twelve thousand sealed; of the tribe of Reuben twelve thousand sealed; of the tribe of Gad twelve thousand sealed.
5. "Of the tribe of Judah twelve thousand sealed," signifies love to the Lord, and that all who are in that love are in heaven, and come into heaven n. 433; "of the tribe of Reuben twelve thousand sealed," signifies the light of truth from that good, and that all who are in that light are in heaven and come into heaven n. 434; "of the tribe of Gad twelve thousand sealed," signifies the consequent good of life (n. 435, 436).
Arcana Coelestia # 1528
1528. The life that goes with evil desires and resulting pleasures sometimes appears as a coal fire among evil spirits. The life of the Lord's love and mercy which flows into them is turned into this kind of fire. The life of their delusions however looks like the glow from that fire - a glow that is dim and does not reach very far. But indeed when the life that stems from mutual love draws near, that burning is put out and converted into cold, while that dim light is converted into darkness. For evil spirits dwell in darkness, and what is astonishing, some even love darkness and detest the light.