Peace already won inside a person turns on itself here. The state of stillness reached through meditation moves to destroy the increase of the flesh, but the fleshly power does not die; it escapes down into the lower mind and waits there, sheltered, until the peace itself is spent. This is how gains from meditation are lost. The calm you build does not simply erase the appetites; they retreat below and outlast the quiet if it is not renewed.
So the 2 live on the same ground and trade places. When stillness fades, the increase of the flesh comes back up out of the lower mind with all its old strength, and the ground once ruled by peace is ruled again by craving.
Jeroboam: the increase of the flesh, the growing power of appetite and craving in a person
Egypt: the lower mind, the dark region below where fleshly power hides and waits out the season of stillness