Soul & Water

In chapter 2 of the BG there is elaboration about how the soul does not have a beginning. And what does not have a beginning does not have an end.

An illustration to explain.

Water!!!

We know states of water : liquid, solid & vapour. We know forms: lakes, rivers, snow, ice, clouds, steam. And most of us can relate to the water cycle as well.
Now a river has a start and end and so does the cloud or lake. And maybe one can define the begining and end of rain as well.

But can someone say where the water cycle begins? or where water started??? does it start with the ocean or ends there?

Any form or state, its still water really.

Same for the soul.