Nothing means what you thought it meant.
It means nothing.
You thought around the edge of nothing,
but you couldn't think nothing.
Remove one thing from your thoughts,
then another, and another;
still, you're stuck with the thought of removal.
The thought of theft
is the theft of thought.

Someone's horse is drinking calmly
from the fish-thick ditch.
Now the horse is gone.
Now the someone is nothing.
And here I am, thinking of them.