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)

472. 'On the day in which God created Man' means when he was made spiritual, and 'in the likeness of God He made him' when he was made celestial. This is clear from what has been stated and shown already. Strictly speaking, the expression 'to create' has regard to a person while he is being created anew, or regenerated, whereas 'to make' has regard to when he is being perfected. This is why in the Word a careful distinction is maintained between 'creating', 'forming', and making', as has appeared already in Chapter 2 where, the subject being the spiritual man who became celestial, it is said that 'God rested from all His work which God had created when making it'. The same distinction occurs in other places, where 'creating' has regard to the spiritual man, while 'making', which is perfecting, has regard to the celestial man. See 16, 88.