Here we are touching on that character of the passage nature which issues in the spatial relations of simultaneous bodies.

This possible identity of the durations in the case of the sense-awareness of distinct minds is what binds into one nature the private experiences of sentient beings.

We are here considering the spatial side of the passage of nature.

Passage in this aspect of it also seems to extend beyond nature to mind.
It is important to distinguish simultaneity from instantaneousness.

I lay no stress on the mere current usage of the two terms.