Date: 2009, trans. 2012

"Soon the countryside began to merge into shapes I vaguely recognized, it became more and more familiar until what I saw through the window coalesced with the images I had in my mind's eye."

— Knausgaard, Karl Ove (b. 1968)

Date: 2010

"In her mind's eye she saw it, saw it all at last."

— Cronin, Justin

Date: April 18, 2011

"And so it goes, researchers say, with most study sessions: difficulty builds mental muscle, while ease often builds only confidence."

— Carey, Benedict (b. 1960)

Date: September 2, 2011

"The disasters reveal a limitation of the muscle metaphor: certain evolutionarily prepared drives seem to withstand even the most bulked-up powers of will."

— Pinker, Steven (b. 1954)

Date: March 17, 2012

"It forces the brain to resolve internal conflict, giving the mind a workout that strengthens its cognitive muscles."

— Bhattacharjee, Yudhijit

Date: May 7, 2012

"The fear gets released later on, while I'm falling asleep and near-misses replay themselves in my mind's eye like an endless computer game fraught with constant hazards, in which I'm a disembodied Steadicam hurtling through busy city streets at the same speed something falls, pedestrians appeari...

— Kreider, Tim (b. 1967)

Date: August 2012

"My father tried turning his thoughts into a substitute immune system."

— Roth, Marco (b. 1974)

Date: April 12, 2013

"All of which goes to show that the real 'eye' of the beholder is the brain itself."

— Kandel, Eric R. (b. 1929)

Date: May 12, 2014

"Now a growing stream of research suggests that strengthening this mental muscle, usually with exercises in so-called mindfulness, may help children and adults cope with attention deficit hyperactivity disorder and its adult equivalent, attention deficit disorder."

— Goleman, Daniel (b. 1946)

Date: May 7, 2014

"You learn to keep your mental body armor handy to protect against sudden attacks -- providing precious seconds to collect yourself and fight back."

— Armeni, Damon T.