Emptiness is a name for nothingness,
A name for ungraspibility,
A name for mountains, rivers, the whole earth.
It is also called the real form.
In the green of the pines,
The twist of the brambles,
There is no going and coming;
In the red of the flowers
And the white of the snow,
There is no birth and no death.

- Ryusai

One more poem that I thought would add to the list. :)