there is a poem which repeats the phrase "what falls away" at the end of what I believe are four sections. I thought it was a Wallace Stevens poem, but it is not. It's is possible it is by Theodore Roethke but I can't seem to confirm it.
The actress Mia Farrow used this poem as a sort of preface to her autobiography and took her title from the poem's phrase "What Falls Away." Anyone know the poem's title and its author?

not quites as you mention, but could it be this one ... ?

The Waking

I wake to sleep, and take my waking slow.
I feel my fate in what I cannot fear.
I learn by going where I have to go.

We think by feeling. What is there to know?
I hear my being dance from ear to ear.
I wake to sleep, and take my waking slow.

Of those so close beside me, which are you?
God bless the Ground! I shall walk softly there,
And learn by going where I have to go.

Light takes the Tree; but who can tell us how?
The lowly worm climbs up a winding stair;
I wake to sleep, and take my waking slow.

Great Nature has another thing to do
To you and me; so take the lively air,
And, lovely, learn by going where to go.

This shaking keeps me steady. I should know.
What falls away is always. And is near.
I wake to sleep, and take my waking slow.
I learn by going where I have to go.

-- Theodore Roethke

it seems that Steven Lautermilch wrote a poem with this title
- but I can't find it