To be behind, (Genesis 18:10), signifies not to be joined together, but at his back. What is separated from any one, this is represented in another life, by a kind of rejection, as it were, to the back. (Arcana Coelestia 2196)

In Genesis 19:17, this signifies being away from doctrinal things. (Arcana Coelestia 2417)

In Genesis 16:13, Here, behind, or after, signifies within or above, or an interior or superior principle.

In Revelation 1:10, 'behind' signifies that people who do not approach the Lord only (Apocalypse Revealed 42)

(Odkazy: Arcana Coelestia 1955)

1393. Communications are also effected in a remarkable fashion by means of removings, the nature of which man is not able to perceive. Things that are sad and irksome are removed in an instant, and those which are delightful and happy are presented without any hindrances; for once the former have been removed angels flow in and communicate their own forms of happiness.