[deleted]
castel,
I would take issue with the idea that "dimensions are the unchanging realities."
If we consider the evolution of the concept, dimensions originate as a modeling tool. They are based on geometric coordinates. As they were applied in real world situations, such as geography, it became evident such models were inherently flexible, such as a straight line in space and a straight line on the earth's surface were not the same thing. As topography became ever more complex and we started laying holographic spaces on top of one another, dimensionality multiplied. The fact remains though, they are a model of reality, not some mathematical basis for it. Your coordinate system and your neighbor's could very well produce completely different perspectives of the same space, so wouldn't there effectively be a three dimensional coordinate system for every point of reference and thus space is infinitely dimensional?
Now consider how it is that time is treated as a dimension, rather than a dynamic process: The basis of human knowledge and causal logic is the linear narrative. Whether the ability to tell a coherent story, or construct a rational argument, it is the ability to draw out the series of consecutive steps. This is the basis of every discipline you can name, whether it's history, math, literature, science, etc.
The problem is that this is an observation of the process, rather than participation in it. We think of time as though it were a book, going from beginning to end, with each step following the previous. The dimension of time then, is like the frames of a film, with each step as its own unit and we, or the light of the projector, goes from one to the next.
Consider though, how the process of time actually happens, as we are physically participating in it: There is this sea of energy all around us and we move through it, as it swirls about, we consume information carrying doses of energy and out of them, process conceptual units of thought. Then more information/energy pours in and we have to transition to the next thought. So for our minds, time is that series of thoughts we process. The larger reality is less linear and more cumulative though. While we must mentally maintain a coherent stream of consciousness in order not to become completely disoriented, the environment isn't always so cooperative and frequently relevant and necessary information isn't provided in a linear fashion. For that reason, our brains have two sides. The rational, left brain is a form of clock, that coalesces information into a reasonably coherent train of sequential thoughts, while the emotional right brain is more of a thermostat, in that it is constantly acting on and reacting to the cumulative energies and processing the information at a subconscious level, then feeding what is deemed most important to the conscious brain in order to steer the physical actions.
So for this subconscious emotional brain, reality is not a neat sequential series of constructed perceptions, but a mass of input that must be edited quickly and mostly ignored. Its main area of concern is not consideration of past events and planning for future ones, but merely processing what is constantly present. Instead of being the frames of the film, all neatly laid out in a series, it is more like the projector light, flashing on what is in front of it, as this information streams by, from being in the future, to being in the past. The need to sequence is a consequence of our mobility and need to navigate. Plants have very effective thermostats to monitor their physical reality, but no central sequencing function because they don't have to move. That sequencing function is a higher order developmental trait.
This dichotomy plays out across much of our conscious existence. Men tend to be more linear, while women tend towards a more cumulative view of life. Western religions tend to be more action oriented and based on narrative tales of moving through context in search of ideals, while eastern religions tend to be more contemplative and observant of natural processes as they happen, rather than being the agent of change. Also they tend to worship the ancestors which are their foundations, rather than worshipping ideals to which they aspire/wish to travel to, as western religions do.
So it happens they have opposing views of time, with the western view being that future is in front of the observer and the past behind, because that is how ones motion carries ones perspective. The eastern view is of the past in front of the observer, because it has already happened and can be seen, while the future is behind, because when one is not moving, but witnessing, the information of events goes by, on to other places and observers.
I do agree that space is fundamental, as both absolute equilibrium state and infinitely boundless. I don't know that I would consider it a substance though, but permeated by substance. As you say, it isn't space which bends, but the matter traversing it. There are two, somewhat contradictory, descriptions of Relativity, which seem to co-exist without being fully acknowledged. One holds that space is completely relative and it is only the relative motion of one frame to another which distorts the perception of rates of motion, aka time, in each other. So that if two frames moved by one another at C, it would only appear the other frames clock has stopped. The other description holds that a clock in a frame at rest actually moves faster than one in a frame affected by velocity, acceleration or gravity.
In the second, space acts as a form of equilibrium state, such that anything moving through it will have their atomic motion slowed, since the combination of external velocity and internal activity cannot produce any motion exceeding C. Thus something traveling at close to C will still measure light traveling at C because their own sense of time has been slowed. Since clocks of GPS satellites must be calibrated to their gravitational fields and accelerated frames, it would seem there is a real effect and not just perception of other frames. A possible experiment would be to scatter clocks out in space and determine which runs fastest. This clock would then be the one closest to the pure equilibrium of space.
I think the first is wrong. It would mean another reality could be passing through ours as a form of light and we would be passing through theirs as light. Obviously difficult to disprove, but if the second description is true, then the first cannot be. Someone with more knowledge might tell me where I'm wrong on this, but so far it's been a point which receives little response.
Which is to say that I many regards, we are in agreement, but I think some concepts, such as dimensionality and especially the dimensionality of time, fall in the category of emergent models/language tools, rather than aspects of a more fundamental reality.