Through: the act of making a passage in a barrier into a through (or, in an alternate dialect of English, a door). For a door to pass to the other side of a wall, it must be entered. Until then it is a door and a passage in but not through. In the term “that is a door through the wall”, what is represented as a term indicating space is really one indicating the place where through energy has been charmed and remains available if actively entered.
New Grass Thrusting Through Old Thatch
The Green Earth Dictionary 