'Rivers' or 'floods' signify temptations. 'Rivers' signify truths in abundance serving the rational self, and so, the understanding, for the purpose of doctrine and life.

In Isaiah 43:2, 'rivers' and 'waters' signify difficulties and falsities.

(Odkazy: Apocalypse Revealed 683)

The firmament of heaven represents mutual love. The firmament, as in Genesis 1, signifies the internal man.

(Odkazy: Arcana Coelestia 24)