All that can be done is to use language which may speculatively demonstrate it, and also to express the relation of this factor in nature to other factors.
It is an exhibition of the process of nature that each duration happens and passes.

The process of nature can also be termed the passage of nature.

I definitely refrain at this stage from using the word 'time,' since the measurable time of science and of civilised life generally merely exhibits some aspects of the more fundamental fact of the passage of nature.

I believe that in this doctrine I am in full accord with Bergson, though he uses 'time' for the fundamental fact which I call the 'passage of nature.' Also the passage of nature is exhibited equally in spatial transition as well as in temporal transition.

It is in virtue of its passage that nature is always moving on.