Date: 1820

"And we breathe, and sicken not, / The atmosphere of human thought: / Be it dim, and dank, and gray, / Like a storm-extinguished day, / Travelled o'er by dying gleams; / Be it bright as all between / Cloudless skies and windless streams, / Silent, liquid, and serene; / As the birds within the win...

— Shelley, Percy Bysshe (1792-1822)

Date: January, 1884

"Our mental life, like a bird's life, seems to be made of an alternation of flights and perchings."

— James, William (1842-1910)

Date: 1992

"It was hard enough to rescue himself from the avalanche of his own feelings, without allowing the gloomy St Bernard of his attention to wander into other fields."

— Edward St. Aubyn (b. 1960)

Date: 2006

"Weber still saw the rarest of butterflies, fluttering mind, its paired wings pinned to the film in obscene detail."

— Powers, Richard (b. 1957)

Date: 2009, trans. 2012

"As all the thoughts and images of consciousness began to move in directions over which I had no control, and I seemed to be lying there watching them, like a kind of lazy sheepdog of the mind, I knew sleep was around the corner."

— Knausgaard, Karl Ove (b. 1968)

Date: May 21, 2011

"My thoughts turn into the cowbirds wandering among the horses’ hooves."

— Klinkenbourg, Verlyn (b. 1952)

Date: June 30, 2017

"Research explains why forgetting delivers this memory boost. Memories don't fly out of our brains like sparrows from a barn."

— Boser, Ulrich

Date: May 4, 2018

"But if I can identify the lizard of envy crawling around in my psyche, I can usually tamp down the ire."

— Marino, Gordon