I was walking again
in the woods,
a yellow light
was sifting all I saw.

Willfully,
with a cold heart,
I took a stick,
lifted it to the opposite side
of the path.

There, I said to myself,
that's done now.
Brushing one hand against the other,
to clean them
of the tiny fragments of bark.

Jane Hirshfield

http://www.poemhunter.com/poem/changing-everything/