It’s amazing how it’s not only metaphorical and symbolic but it shows up in the brain in just the same ways.
Each doorway is an event boundary, registering as “START” / “STOP”. So when we talk about a “doorway to a different time”, it really is. Physically measurable in the brain, behaving just like it would if your body had stepped into or out of an actual 3D room.
It really is!
So when the ancient romans created the “Roman Room” memory technique, they really were creating rooms in the mind to store different memories in.
Such a level of discrete control over the mind BY the mind… we can program ourselves and have for thousands of years. Amazing.