My Failing: Humanity

My heart is solid,
Its surface firm and sturdy.
Nothing phases through
My impenetrable walls.

But sturdy walls
May collapse,
And my shield
Crumbles and turns to powder.

My diamond center,
My impenetrable barrier,
Is just a façade.
My heart is glass.

The throbbing muscle
Hidden behind a clear window,
Forever pumping thick warm blood,
Declares my mortality.

My reality…
A broken,
Shattered,
Glass heart.