The Beast With Claws

The beast with vicious claws
has called on me again;
once more my life force pours
from rips and tears. The pain
is more than I can bear.
My sun shone bright today
until the beast's dark stare
which turned warm golden light to grey.

I did not ask it here.
I thought I locked the doors
against this beast I fear.
O what can be the cause
of its return to me;
why won't it ever let me be?