> but to yourself, you don’t see any change This hints to me that you might be thinking of the concept of invariant vs relativistic mass[0] > i.e some sort of

> but to yourself, you don’t see any change This hints to me that you might be thinking of the concept of invariant vs relativistic mass[0] > i.e some sort of integral of moving matters between a distance, with respect to time. It might be easier if you intuit it as total energy (encapsulates the relativisic aspects) - but that description you wrote seems to be another way to rephrase the curvature of space-time analogy; you could say that what you are describing is retreading how "steep" the bend is, yes? 0: https://en.wikipedia.org/wiki/Mass_in_special_relativity https://en.wikipedia.org/wiki/Mass_in_special_relativity