Chase the Horizon

I wear no watch
Upon my wrist,
And so, have no
Concept of time.
I don't know how long
I've been going,
Or how much longer
I've got to go on for.
I just know I have to
Carry on,
Keep going till the
Light of day is gone.
Ignore the pain and
Chase the setting sun,
Running, running,
Until the day is done.