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Some things that fly there be—
Birds—Hours—the Bumblebee—
Of these no Elegy.
Some things that stay there be—
Grief—Hills—Eternity—
Nor this behooveth me.
There are that resting, rise.
Can I expound the skies?
How still the Riddle lies!
Emily Dickinson
http://www.poemhunter.com/poem/some-things-that-fly-there-be/