
Interview with Ed Hirsch (1986), Writers at Work: The Paris Review Interviews, Eighth Series (Penguin, 1988)
A Retrospective Glance at the Lifework of a Master of Books
Fragments of a Poetics of Fire (1988)
Interview with Ed Hirsch (1986), Writers at Work: The Paris Review Interviews, Eighth Series (Penguin, 1988)
Transcript of Emilio Insolera on BBC Radio (October 9, 2017)
"The Neglected Plane of Wisdom" (1966), p. 250
Sun Ra : The Immeasurable Equation (2005)
From A Note on Poetry (circa 1936) quoted in Modern American Poetry (1950) by Louis Untermeyer
General sources
“Kindness is the language which the deaf can hear and the blind can see.”
Unsourced in The Philosophy of Mark Twain: The Wit and Wisdom of a Literary Genius (2014) by David Graham
Disputed
“Music is a kind of harmonious language.”
Zanolini, Biografia di Gioachino Rossini (1875)
The Problem with Programming (Interview with Bjarne Stroustrup), MIT Technology Review, November 28, 2006, Jason Pontin, 2007-11-15 http://technologyreview.com/Infotech/17831/page3/,