648. Verse 18. And another angel went out from the altar, having authority over fire, signifies the heavens of the Lord's celestial kingdom, which are in the good of love from the Lord. By "another angel" the heavens of the Lord's celestial kingdom are here signified, because he was seen to go out from the altar, for by "an altar" is signified the worship of the Lord from love, see above (n. 392), and by "fire" is signified love (n. 468), and by "fire upon the altar" is signified the Divine love (n. 395). It is said that "he had power over fire," because the angels watch over that love in themselves.
