This poem is quite fabulous... and far less obscure or hermetic than
The Shape of the Fire... although I would not think to reduce it to any single simple "meaning". The sound or music of this poem is more traditional with its use of rhyme... but still there are the more complex echoes... repetitions of sound: assonance, consonance, rhyme within lines and not merely at the end of lines:
In a dark time, the eye begins to see,
I meet my
shadow in the
deepening shade;
I hear my
echo in the
echoing wood--
A lord of nature
weeping to a tree,
I live between the
heron and the
wren,
Beasts of the hill and serpents of the den.
Knowing Roethke's connection with American Romantics of the West Coast... especially the Northwest... and their connection with Asian poetry... I wonder if Roethke's musical structure of internal rhyme and repetition might not echo such poetic uses as found in Asian... and especially Chinese poetry... as well as the Anglo-Saxon poetic forms filtered through Pound and Hopkins as I mentioned earlier.
Roethke was deeply passionate about the great Romantic and mystical poets such as Whitman, Emerson, Blake, Wordsworth, and Yeats. I definitely sense an imagery drawn from... or at least suggestive of many of the Romantic poems of the poet's personal travel through a dark place...
In a dark time, the eye begins to see,
I meet my shadow in the deepening shade;
I hear my echo in the echoing wood--
These lines immediately suggest an affinity with nothing less than Dante's
Inferno:
Nel mezzo del cammin di nostra vita
mi ritrovai per una selva oscura,
ché la diritta via era smarrita.
(Midway on our life's journey, I found myself
In dark woods, the right road lost. To tell
About those woods is hard -- so tangled and
rough- Pinsky tr.)
But there are also echoes of Eliot- "Footfalls echo in the memory/Down the passage which we did not take/Towards the door we never opened" (which may not be surprising considering Eliot's profound admiration of Dante).
What's madness but nobility of soul
At odds with circumstance? The day's on fire!
The suggestion of a link between madness and the poet's personal struggles might be a tired cliché in the work of many writers... but not so much with Roethke... especially when one considers his own personal experience with exorcising such demons... and the fact that he never wallows in a "woe is me" attitude, but rather suggests something of a visionary deeper understanding of or transformation of the self growing out of his experiences.
Dark,dark my light, and darker my desire.
My soul, like some heat-maddened summer fly,
Keeps buzzing at the sill. Which I is I?
A fallen man, I climb out of my fear.
The mind enters itself, and God the mind,
And one is One, free in the tearing wind.
Again I think of Dante's Comedia... which is essentially the journey of the soul... in which the poet awakens... in spite of the great length of the poem and the time that seemingly has passed... but a short time later... yet profoundly transformed. Also... to my mind... there are reverberations of San Juan de la Cruz' (St. John of the Cross') equally visionary
Dark Night of the Soul.
...There is the lucky dark...
no sign for me to mark,
no other mark, no guide
except for my heart- the fire- the fire inside!
That led me on
keener than sunlight in the highest blue...
O dark of night, my guide!...
I stayed, I stayed; forgot me...
slipped from the me and not-me
and ties of earth untwined
among the lilies falling and out of mind.
from The Dark Night (of the Soul)- San Juan de la Cruz, tr. John Frederick Nims
Hopefully I'm making some sense as I'm actually sick as a dog this evening

.