“[C]onstitutional silences, like silences of other kinds, aren’t just occasional gaps or omissions in an otherwise-seamless design. They’re everywhere and come in as many flavors and varieties as sounds. Ambiguity and multiplicity of meanings are in a sense manifestations of silence.”

Soundings and Silences (2016)

To an Insect; reported in Bartlett's Familiar Quotations, 10th ed. (1919).

Source: The Curious Incident of the Dog in the Night-Time

Vol. II, p. 30
1980s, Letters to the Schools (1981, 1985)
Context: Attention involves seeing and hearing. We hear not only with our ears but also we are sensitive to the tones, the voice, to the implication of words, to hear without interference, to capture instantly the depth of a sound. Sound plays an extraordinary part in our lives: the sound of thunder, a flute playing in the distance, the unheard sound of the universe; the sound of silence, the sound of one’s own heart beating; the sound of a bird and the noise of a man walking on the pavement; the waterfall. The universe is filled with sound. This sound has its own silence; all living things are involved in this sound of silence. To be attentive is to hear this silence and move with it.

Source: No Man Is an Island

Nous voulons explorer la bonté contrée énorme où tout se tait
"La jolie rousse" (The Pretty Redhead), line 26; p. 135.
Calligrammes (1918)

Source: The Curious Incident of the Dog in the Night-Time

Deus é o silêncio do universo, e o homem o grito que dá um sentido a esse silêncio.
Lanzarote Notebooks (1990), quoted in The Notebook, entry for 9 October 2008.