8299. 'In the mighty waters' means surrounded by a vast quantity of falsities. This is clear from the meaning of 'waters' as falsities arising from evil, dealt with just above in 8297, so that 'the mighty waters' are falsities in a vast quantity. The fact that they were surrounded or hemmed in by them, see 8210, 8232.

Cities of the mountain and cities of the plain (Jeremiah 33:13) signify doctrines of charity and faith.

(सन्दर्भ: Arcana Coelestia 2418)