'Spreading themselves on the earth,' as in Genesis 8:17, signifies the internal self operating on the external.

(Odkazy: Arcana Coelestia 913)

4466. 'Then we will give our daughters to you, and your daughters we will take to ourselves' means a joining together in this manner. This is clear from what has been stated above about marriage, in 4434, namely that 'marriage' in the spiritual sense means good and truth joined together. For 'giving our daughters to you and taking your daughters to ourselves' describes an intermarrying.