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.

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

238. Those with whom the love of self and the love of the world reign, do not know what heaven and heavenly happiness are; and it appears incredible to them that happiness is given in any other loves than in them. Nevertheless, the happiness of heaven enters so far as the loves of self and the world, regarded as ends, are removed; and the happiness which succeeds on their removal is so great as to exceed all human comprehension.