A song I can't sing

Daddy, you once told me
to stand up strong,
fight for my will,
and to sing that song

But my lungs are worn
and my chest is heaving
I don't have the strength
to keep on breathing

My heart is quickly
crinkling, wrinkling up
my mind is a windmill
that's had wind enough

My arms are aching
my knees so weak
my head is screaming
my thoughts so bleak

Daddy, I am slowly
giving in to the fight
my soul is burning
through the night

Daddy, don't pray on everything
for a song I can't sing