Percy Bysshe Shelley, Mary Wollstonecraft Shelley (1840). “A defence of poetry. Essay on the literature, arts, and manners of the Athenians. Preface to the Banquet of Plato. The banquet”, p.33
YouTube Channel "Richard Dawkins Foundation for Reason & Science"/"'A Universe From Nothing' by Lawrence Krauss, AAI 2009", www.youtube.com. October 21, 2009.
Jean Cocteau (1926*). “A Call to Order, Written Between the Years 1918 and 1926 and Including "Cock and Harlequin", "Professional Secrets", and Other Critical Essays”
Niels Bohr's response to questions on the nature of language during his first meeting with Werner Heisenberg (Summer 1920), as quoted in "Discussions about Language", 1933, in Robert J. Pranger "Defense Implications of International Indeterminacy" (p. 11), 1972, and in Steve Giles "Theorizing Modernism: Essays in Critical Theory" (p. 28), 1993.