Doors can also represent spiritual openings or portals– positive or negative (yikes!)
You can go thru a door into new spiritual territory, something “outside” what you are used to operating in, a new realm, even a new dimension. If you are lucid dreaming– avoid doors in floors– they can be portals to bad places. Likewise, doors or openings on ceilings, can lead to heavenly realms! Again, you have to be discerning.