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)

89. "'I will give to eat from the tree of life.'" This symbolizes an assimilation of the goodness of love and charity from the Lord.

In the Word, to eat means, symbolically, to assimilate, and the tree of life symbolizes the Lord in respect to the goodness of love. Thus eating of the tree of life symbolizes an assimilation of the goodness of love from the Lord.

To eat means, symbolically, to assimilate because as natural food, when eaten, is assimilated into the life of a person's body, so spiritual food, when received, is assimilated into the life of his soul.

The tree of life symbolizes the Lord in respect to the goodness of love because that is what the tree of life symbolizes in the Garden of Eden, and because a person has celestial and spiritual life from the goodness of love and charity that he receives from the Lord.

Many passages make mention of a tree, and it means a person of the church, and in the broadest sense the church itself, its fruit meaning goodness of life. The reason is that the Lord is the tree of life, the source of every good in the church and in a person of the church. But more on this subject in its proper place.

We say the goodness of love and charity, because the goodness of love is celestial good, which is an expression of love toward the Lord, and the goodness of charity is spiritual good, which is an expression of love for the neighbor. The nature and character of each good will be told in discussions to follow. Something about them may be seen in the book Heaven and Hell, nos. 13-19.