Danger Venomous Snakes in the Area

It's one thing to know it has to end
And another to feel it ending. Once
You're almost dead you know both,
Will always know both, even should

You chance, for a while, to survive.
It doesn't improve with time. But you
Did not come to this experience to whine.
The stream that was never the same

Does not note its service as a parable
For those about to dash their skulls
On the rocks it only rushes across
On its way to being nothing like an end.