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 5:1-3
1
Let me sing for my well beloved a song of my beloved about his vineyard. My beloved had a vineyard on a very fruitful hill.
2
He dug it up, gathered out its stones, planted it with the choicest vine, built a tower in its midst, and also cut out a winepress therein. He looked for it to yield grapes, but it yielded wild grapes.
3
"Now, inhabitants of Jerusalem and men of Judah, please judge between me and my vineyard.
