'Sons of the stranger' signify counterfeit truths, or falsities. 'Our sons' signify the doctrines of truth, and 'our daughters,' the doctrines of good, as in Psalm 144:11-12.

(Odkazy: Arcana Coelestia 489; Psalms 144:11)

7448. 'And extremely noxious flying insects came to the house of Pharaoh, and to the houses of his servants, and into all the land of Egypt' means that malevolent falsities burst out from every side among them. This is clear from the meaning of 'noxious flying insects' as malevolent falsities, dealt with above in 7441; and from the meaning of 'the house of Pharaoh, the houses of his servants, and all the land' as every single thing in the natural, dealt with in 7396, 7441, 7442, at this point from every single one or from every side, since the bursting out of those falsities is meant. The proximate meaning of the coming of the noxious flying insects to the house is that falsities entered where evils were present and joined themselves to the evils. But when falsities have been joined to evils the evils burst out by means of the falsities. So it is that 'the noxious flying insects came to the house of Pharaoh, and to the houses of his servants, and into all the land of Egypt' means that malevolent falsities burst out, and indeed from every side.