Persistence

He's a stubborn old thing -
got the bit between his teeth,
you might say.
Don't know when to stop pullin',
though his old harness hangs loose
on his thin frame.
Knows his duty, that we'll say for him;
he'll pull 'til he can't pull no more -
pull 'til he dies.
He knows he's got nothing if he can't work,
no green pastures, just the slaughterhouse.
He's only a horse.
But he's a stubborn old thing -
got the bit between his teeth,
you might say.