7522. 'And there will then be dust in all the land of Egypt' means the damnation of those falsities in the natural mind. This is clear from the meaning of 'dust' as that which is damned, dealt with above in 7418; from the meaning of 'the ashes of the furnace', which were turned into dust, as falsities that are the product of evil desires, dealt with just above in 7519, 7520; and from the meaning of 'the land of Egypt' as the natural mind, dealt with in 5276, 5278, 5280, 5288, 5301. The meaning of 'dust' as that which is damned is evident from the places in the Word quoted in 7418, and also from the following in Moses,

If you will not obey the voice of Jehovah your God, cursed shall you be in the city, cursed shall you be in the field. Jehovah will make the rain of your land dust and grit; ² it will come down onto you from heaven until you are destroyed. Deuteronomy 28:15-16, 24.

8087. 'From the firstborn of man even to the firstborn of beast' means the falsity, interior and exterior, belonging to separated faith. This is clear from the meaning of 'the firstborn of Egypt' as faith separated from charity, as immediately above in 8086, and so falsity belonging to faith, for those who separate faith from charity both in doctrine and in life are inescapably subject to falsity since the evil that pervades their life is constantly active, pressing falsity into agreement with itself (or if truth presents itself that evil then misapplies it and thereby brings it into agreement with itself, thus falsifies it); and from the meaning of 'man and beast' as what is interior and what is exterior, dealt with in 4724, 7523.