Evidently motion in an instantaneous space is unmeaning.

Motion expresses a comparison between position in one instantaneous space with positions in other instantaneous spaces of the same time-system.

Cogredience yields the simplest outcome of such comparison, namely, rest.
Motion and rest are immediately observed facts.

They are relative in the sense that they depend on the time-system which is fundamental for the observation.

A string of event-particles whose successive occupation means rest in the given time-system forms a timeless point in the timeless space of that time-system.