Poem: Mary Oliver from "The Swan"

Did you too see it, drifting, all night, on the black river?...
Did you hear it, fluting and whistling
A shrill dark music - like he rain pelting the trees - like a waterfall
Knifing down the black ledges?
And did you see it, finally, just under the clouds =
A white cross streaming across the sky, its feet
Like black leaves, it wings likethe stretching light of the river?
And did you feel it, in your heart, how it pertained to everything?
And have you to finally figured out what beauty is for?
And have you changed your life?