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)

3288. 'And Rebekah his wife conceived' means from Divine Truth as the mother. This is clear from the representation of 'Rebekah' as the Divine Truth of the Rational, dealt with in the previous chapter, and from the meaning of 'conceiving' as the first beginnings of the rise of the Divine Natural, as from the mother. For as stated just above, the Divine Natural came into being from the Divine Good of the Rational as father and from the Divine Truth of the Rational as mother. Scarcely anybody knows that this is so, especially since few know that the rational is distinct and separate from the natural. None but those who are truly rational know of that distinctness, and none are truly rational but those who have been regenerated by the Lord. People who have not been regenerated do not grasp it since to them the rational and the natural are one and the same.