“Typography cracked the voices of silence.”
Source: 1960s, The Gutenberg Galaxy (1962), p. 283
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Marshall McLuhan 416
Canadian educator, philosopher, and scholar-- a professor … 1911–1980Related quotes
“God, I miss you,” he said in a voice that cracked. “Every night. Every day…”
Source: Lover Reborn
“From my silence, only my voice is missing.”
En mi silencio sólo falta mi voz.
Voces (1943)

Source: Places I Never Meant To Be: Original Stories by Censored Writers

“It is so sweet to hear His voice in silence, so sweet indeed.”
Flow of Divine Guidance (vol.1)

“We give voice to our trivial cares, but suffer enormities in silence”
Phaedra, line 607 https://www.thelatinlibrary.com/sen/sen.phaedra.shtml
Tragedies
Original: (la) Curae leues locuntur, ingentes stupent.

“Preach the Truth as if you had a million voices. It is silence that kills the world.”
quoted in [LifeSite, The heart of the Catholic Church's current crisis is the abandonment of law and doctrine - LifeSite, 2022-06-07, 2022-05-05, https://www.lifesitenews.com/opinion/the-heart-of-the-catholic-churchs-current-crisis-is-the-abandonment-of-law-and-doctrine/]
Variant versions:
I see the world is rotten because of silence … speak the truth in a million voices. It is silence that kills. (quoted at 0:23 of [Randall Terry, The Silence That Kills, 2022-06-07, 2020-10-19, 23:29, https://www.youtube.com/watch?v=ql2ncPIgui0])
Original Italian: Oimé, non più tacere! Gridate con centomiglia di lingue. Veggo che, per lo tacere, el mondo è guasto, la Sposa di Cristo è impalidita ( Lettera 16, "A uno grande prelato" http://www.clerus.org/bibliaclerusonline/it/eki.htm#q)
lit.: "O alas, be silent no more! Shout with a hundred thousand tongues. I see that, through silence, the world is broken, the Bride of Christ is impaled"

“I have a voice, too, and for good or evil mine is the speech that cannot be silenced”
Source: Heart of Darkness