403. And as it were a mountain* burning with fire was cast into the sea, signifies the appearance of infernal love with those who are in the externals of the church and in faith alone. By "the sea" is signified the church with those who are in externals, and in faith alone; and they who are in externals are called, in common language, the laity, because they who are in internals are called the clergy (n. 397, 402). "A mountain" signifies love (n. 336), and "a mountain burning with fire" signifies infernal love (n. 494, 599); this is the appearance of this love with those who are here treated of, and is so seen by the angels; the reason is, because faith alone is faith separated from charity (n. 388); and where there is no charity, that is, love towards the neighbor, which is spiritual love, there is infernal love; an intermediate love does not exist except among the lukewarm (concerning whom see in Revelation 3:15, 16).
* The original Latin omits "mountain."