Inaudible as dreams! the thin blue flame
Lies on my low-burnt fire, and quivers not;
Only that film, which fluttered on the grate,
Still flutters there, the sole unquiet thing.
Methinks its motion in this hush of nature
Gives it dim sympathies with me who live,
Making it a companionable form,
Whose puny flaps and freaks the idling Spirit
By its own moods interprets, every where
Echo or mirror seeking of itself,
And makes a toy of Thought.

from 'Frost at Midnight' - Coleridge