52. As long as someone is a spiritual man, the dominion over him runs from external man to internal man, as is said here, 'They will have dominion over the fish of the sea, over the birds of the air', and over the beasts, and over all the earth, and over every creeping thing that creeps on the earth'. When however he becomes celestial and does what is good out of love, then the dominion over him runs from internal man to external man. This is how the Lord describes Himself, and so simultaneously the celestial man, who is a likeness of Him, in David,

You have given him dominion over the works of Your hands; You have put all things under his feet, flocks and all cattle, and also the beasts of the field, the birds of the air, ¹ and the fish of the sea, and that crossing the paths of the seas. Psalms 8:6-8.

Here therefore the beasts are mentioned first, the birds next, and the fish of the sea after that, for the reason that the celestial man starts with love which resides in the will. With the spiritual man it is different. With him fish and birds, which have to do with the understanding, the domain of faith, come first, while beasts come afterwards.

Footnotes:

The "midst" of something in the Bible represents the thing that is most central and most important to the spiritual state being described, the motivation that drives everything else. In general this will be something we love or feel, because at the core of things we are what we love; our loves define us.

(References: Apocalypse Revealed 44, 90, 268; Arcana Coelestia 2252, 2940, 10153, 10365, 10557, 10635, 10641)