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.

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

A turban symbolizes intelligence and wisdom. Aaron's turban of ordinary linen, mean the intelligence that is related to natural truth. See Leviticus 16:4; Ezekiel 44:18. Things made of 'linen' or 'flax' signify truth in the natural level of a person's mind. (Arcana Coelestia 7601)

'A turban' signifies intelligence of truth.

(Референце: Apocalypse Explained 204)