a delicate thing

Ah, sister! Desolation is a delicate thing:
It walks not on the earth, it floats not on the air,
But treads with lulling footstep, and fans with silent wing
The tender hopes which in their hearts the best and gentlest bear;
Who, soothed to false repose by the fanning plumes above
And the music-stirring motion of its soft and busy feet,
Dream visions of aëreal joy, and call the monster, Love,
And wake, and find the shadow Pain, as he whom now we greet.

-- Percy Bysshe Shelley Prometheus Unbound

Prometheus Unbound