7441. 'behold, I send onto you, and onto your servants, and onto your people, and into your houses, noxious flying insects' means that malevolent falsity will be present in every single aspect. This is clear from the meaning of 'Pharaoh, his servants, and his people' as every single part of the natural mind, dealt with in 7396, and when 'into the houses' is added, an entry into the interior parts of that mind as well is meant, as above in 7407; and from the meaning of 'noxious flying insects' as falsities arising out of the evil that was meant by the previous wonder, thus malevolent falsities. Exactly which falsities therefore are meant here by 'noxious flying insects', and what type they belong to, is evident from the evils they spring from. And those evils were evils that exist on the outermost levels of the natural mind, thus on those of the senses, see above in 7419. The falsities which spring from them belong to the same sort.

[2] The same falsities are what are also meant by 'the flies of Egypt' in Isaiah,

It will happen on that day, that Jehovah will whistle for the fly that is in the furthest part of the rivers of Egypt, and for the bee that is in the land of Asshur. They will come and all of them will rest in rivers of desolations, and in the clefts of rocks. Isaiah 7:18-19.

'The fly in the farthest part of the rivers of Egypt' is falsities which reside in the outermost parts of the natural mind, thus on the level of the senses nearest to the body. These falsities are compared to an insect like that sort of insect because on that level they are exactly like insects that fly in the air, obscure the things on more internal levels, and inflict harm on them. For the things which are there are for the most part figments of the imagination; they are illusions giving rise to reasonings that are like buildings founded on nothing but air. Mention of this kind of noxious flying insect occurs again only in David, in Psalms 78:45 and Psalms 105:31, where also the reference is to Egypt. It should be recognized that flying creatures in the Word all mean things that are connected with the understanding, consequently truths or in the contrary sense falsities, 40, 745, 776, 778, 866, 988, 3219, 5149. But the lowest sort of flying creatures, which are insects, mean truths, or in the contrary sense falsities, which are quite low-grade and obscure, as those are which belong properly to the level of the senses. For unless they receive light from the more internal levels, gloom and darkness completely envelop them; for they are nearest to the body and therefore close to earthly things that form the base on which heavenly things rest, and are immersed in thick darkness.

3219. When angels are engaged in discussion about thoughts and ideas, and about influx, birds are seen at the same time in the world of spirits - the forms which the birds take being determined by the subject under discussion. This explains why birds in the Word mean rational concepts or things comprising thought, 40, 745, 776, 991. On one occasion birds came into view, and I saw that one was dark and ugly, two fine and beautiful. When I saw them, behold! certain spirits were there who then descended on me so violently as to send a tremor into my sinews and bones. I supposed that then, as had happened several times before, evil spirits were assailing me in an attempt to destroy me; but that was not so. When the tremor ceased and the spirits who had descended on me stopped moving, I spoke to them asking what it was all about. They said that they had fallen from a certain angelic community in which discussion was taking place about thoughts and influx, and that they had been of the opinion that the things which comprise thought flow in from without, that is to say, by way of the external senses, as is the appearance. But the angelic community in which they were present were of the opinion that it flowed from within. And because they themselves had been governed by falsity they had fallen from there. No one had cast them down, for angels do not cast anyone down from among themselves. It was owing to the falsity reigning in them that they had fallen from there. This had been the reason why it had happened. From this I was given to know that discussion in heaven about thoughts and influx is represented by birds - the discussion of those in whom falsity reigns by dark and ugly birds, but that of those who are governed by truth by fine and beautiful birds. I was at the same time told that all the ideas comprising thought enter into it from within, not from without, even though those ideas seem to do so. I was also told that it is contrary to order for what is posterior to flow into what is prior, or what is grosser into what is purer, and so for body to flow into soul.