This may have appeared on Treeleaf before. If so, I apologize for posting it again. But, I just read this poem in a yoga textbook and smiled. I said to myself, "wow, this is zazen."
The birds have vanished down the sky.
Now the last cloud drains away.
We sit together, the mountain and me,
until only the mountain remains.
Li Po (also Li Bo and/or Li Bai)