Midst
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)
Isaiah 35:1-2
1
The wilderness and the dry land will be glad. The desert will rejoice and blossom like a rose.
2
It will blossom abundantly, and rejoice even with joy and singing. Lebanon's glory Lebanon will be given to it, the excellence of Carmel and Sharon. They will see Yahweh's glory, the excellence of our God.