Apocalypse Explained #230
230. (Verse 15) I know thy works. That this signifies the life of faith alone is evident from the signification of works as being those things that belong to the interior life of man, because works proceed from those things, and are their effects (concerning which see above, n. 157, 185). Here therefore they signify the life of faith alone, because this is treated of in what is written to the angel of this church. To each of the churches it is premised, "I know thy works," and in every case it signifies the things belonging to the church there treated of (see above, n. 98); therefore the quality of the life of faith alone, or of faith separated from charity, is described in what now follows.
Arcana Coelestia #4499
4499. 'Each took his sword' means falsity and evil. This is clear from the meaning of 'a sword' as truth engaged in conflict and consequently the defence of truth, and in the contrary sense falsity engaged in conflict, and consequently the vastation of truth, dealt with in 2799. The reason why 'a sword' at this point also means evil is that Levi was implicated, who represented charity, and so good. When good is turned into evil it uses falsity from evil to fight with, in which case anything it does is evil.