I’m trying to wrap my head around this. I perceive time as though the present moment is a wave I’m riding through space and experience. Does Spacetime, as presently understood, suggest that time is more likely an ocean that exists and is “real” stretching off towards the horizons? In other words, is the present the only thing that is real as we traverse the dimension of time? Or do the distant past and future also exist, despite my inability to experience them, just as distant points in space do?
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You know e=mc^2 ?
c really represents the speed of causality. Light is the only known thing that travels through the space part of spacetime at the speed of causality, so c is pretty much just called ‘the speed of light’. But everything moves through spacetime at the speed of causality. It’s just for us, we travel very slowly through space, and so the rest of that speed is spent traveling through time.
That’s why, in examples describing relativity, an object moving close to the speed of light has time slowed down- since it’s approaching the speed of causality in space, it’s speed through time slows. Because nothing can exceed the speed of causality in spacetime.
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