Traditionally, clouds are symbolic of things indeterminate. Composed of air and water, their essential nature can be attributed to neither element but arises in an obscuring of the two, a betwixt-and-between phenomenon, not unlike human beings, those nebulous creatures who themselves seem caught between realms, floating along between the shimmering horizons of birth and death, here and there, earth and heaven. -John P. O’Grady, "Clouding"
I am a sky filled
with hundreds of cliff swallows
spiraling, plummeting,
equal parts fall and wing, and
I am the emptiness after.
Nice closing line, especially after the fullness. I wonder why you say “a sky” and not “the sky” or just “sky?”
Also, I think you could do without the word “hundreds” — I do like the sound of that line better with “filled” and “cliff” closer together. The sky is, after all, “filled” and “hundreds” qualifies what is potentially even larger without it.