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)

It's easy to see the connection between judging and truth. In a court of law, the whole purpose of the judge is to find the truth. Any time anyone judges anything, we hope it is on the basis of the truth. It's no wonder, then, that judging and judgment in the Bible represent truth being put to work. Depending on the circumstances judging can be teaching truth, determining someone's character from truth or setting order to things according to truth. There is a twist, though -- when the Lord is referred to as a judge, it actually signifies Divine Good, rather than Divine Truth. This is because the Lord judges us ultimately from love, and his truth flows from that love.