In Leviticus 11:7 and Matthew 7:6, this signifies filthy loves of those in the hells of adulterers. (Apocalypse Explained 1044[4]) Swine signify people who love only worldly riches. (Apocalypse Revealed 727)

In Isaiah 65:4, this signifies appropriation of infernal evils. (Apocalypse Explained 659[2]) 'Swine' or 'hogs' correspond to the life of greed and its delight.

(References: Arcana Coelestia 1742)

93. Since this self-centeredness is the taproot of the life we lead, we can see what kind of trees we would be if this root were not pulled up and a new root planted. We would be rotten trees that needed to be cut down and thrown into the fire (see Matthew 3:10; 7:19).

This root is not removed and a new one put in its place unless we see that the evils that constitute it are harmful to our souls, and therefore we want to banish them. However, since they are part of our self-centeredness and therefore give us pleasure, we can do this only reluctantly and in the face of opposition, and therefore by doing battle.