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.

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

664. Verse 11. And after the three days and a half, signifies when it is finished, thus the end of the old church and the beginning of the New Church. This is evident from the signification of "the three days and a half," as being fullness and completion as to the end of the old church, when there is the beginning of the New Church (See above, n. 658). It is said "after the three days and a half" because in the Word "days" signify states, here the last state of the church; for in the Word all times, as "hours," "days," "weeks," "months," "years," "ages," signify states, as here the last state of the church, when there is no longer any good of love or truth of faith left. Because "days" signify states, and the establishment of the Most Ancient Church is treated of in the first chapter of Genesis, and it becomes established successively from one state to another, it is there said:

That there was evening and there was morning the first day, the second, the third, the fourth, the fifth, and the sixth days, even to the seventh, when it was finished (Genesis 1:5, 8, 13, 19, 23, 31; 2:2);

and the "days" there do not mean days, but the successive states of the regeneration of men at that time, and the consequent establishment of the church with them. So also elsewhere in the Word.

2940. 'Ephron was sitting in the midst of the sons of Heth' means those who were primarily able to receive the good and truth of faith. This is clear from the representation of 'Ephron', and also from the meaning of 'the sons of Heth' as those with whom the good and truth of faith could be received and with whom a new Church existed, dealt with in 2913, 2933; and from the meaning of 'the middle' or 'in the midst' as that which is primary or the chief thing, and also that which is inmost, dealt with in 1074. 'The middle' in the internal sense means that which is primary or the chief thing, and also that which is inmost, by reason of the representatives in the next life. When anything good is represented there by means of spiritual ideas, the purest of the good is in the middle and the less and less pure in consecutive degrees from the middle, until lastly at the circumference there is that which is not good at all. And this is why 'in the midst' means both that which is primary or the chief thing and also that which is inmost. The ideas comprising thought are also represented in the same manner, and so are affections too. And all changes of state are represented in that manner, in that everything good or evil is altered as to its position towards the middle. This has its origin in the form possessed by spiritual and celestial things, which is such.