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)

1074. 'The middle of the tent' is the chief thing of faith. This is clear from the meaning of 'the middle' and from the meaning of 'a tent'. In the Word 'the middle' means that which is inmost, and 'tent' charity, or worship deriving from charity. Charity is the inmost, that is, the chief thing of faith and worship, and so is 'the middle of the tent'. That 'the middle' means that which is inmost has been shown already, and that 'tent' means the holiness of love, which is charity, see what has appeared already in 414.