Fragility

I am the pond in the early morning sun

Slant of rays against ice.
Step on the borders
Where water meets grass
And the ice is thick.
This you know and trust
Because I am reliable
And I like to have you there.
But be careful of the center:
The water is deep beyond knowing,
And the ice grows thin.
The waters move,
The waters still.
You are welcome here:
Only please remember
The waters exist.
Calm, I am a pond
Glinting with ice in morning sun.