The caverns of the heart

When night comes like lightning
I watch until it pools like rain.

I listen while it
flows in the cracks,
filtering through the soil
and seeping into bedrock.

The darkness is complete
when my mind turns black,
muted under dark water.

I let the dark climb like ivy
up the walls of my being,
the night flora feeding
on a growing silence.

Awake, I wonder.
How many species live
in the caverns of the heart?