With the flow - NaPoWriMo 14

I do not know what drives me,
I am but a fish
carried by the current
Towards the inevitable waterfall and end
of which no fish knows of the beyond.
Yet despite the torrent around me,
all to often
I appear to be stuck and slow
the lack of progress only punctuated by time
as each moment drops away,
So I am but a fish
in a stream
somewhat awkwardly flailing
in the temporary stream.