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 # 2729
2729. The derivation of genuine conjugial love from good married to truth may also be evident from the fact that it cannot exist with anyone unless good united to truth and truth to good from the Lord are present in him. That derivation may also be evident from the fact that heavenly blessedness and happiness reside in that love, and that everyone in whom that love exists comes into heaven, that is, into the heavenly marriage. It is also evident from the fact that when angels are talking about the union of good and truth, that which is a representative of marriage presents itself in a lower sphere among good spirits, but that which is a representative of adultery presents itself among evil spirits. This explains why in the Word the union of good and truth is called a marriage, but the adulteration of good and the falsification of truth is called adultery and whoredom, see 2466.