“When a tongue at the wrong moment shoots off sharp-pointed words to rouse and hurt the spirit, speech may well soothe speech.”
Source: The Suppliants, lines 446–447 (tr. Christopher Collard)
Original
Καὶ γλῶσσα τοξεύσασα μὴ τὰ καίρια, γένοιτο μύθου μῦθος ἂν θελκτήριος.
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Aeschylus 119
ancient Athenian playwright -525–-456 BCRelated quotes
“Hush your tongues from idle speech.”
Source: Translations, The Aeneid of Virgil (1866), Book V, p. 146
Source: The Prime of Miss Jean Brodie

A Plea For Free Speech in Boston (10 December 1860), as contained in Words That Changed America https://en.wikiquote.org/wiki/Special:BookSources/1461748917, Alex Barnett, Rowman & Littlefield (reprint, 2006), p. 156
1860s

“Speech without word and
Word of no speech
Grace to the Mother
For the Garden
Where all love ends.”
Ash-Wednesday (1930)
Context: Lady of silences
Calm and distressed
Torn and most whole
Rose of memory
Rose of forgetfulness
Exhausted and life-giving
Worried reposeful
The single Rose
Is now the Garden
Where all loves end
Terminate torment
Of love unsatisfied
The greater torment
Of love satisfied
End of the endless
Journey to no end
Conclusion of all that
Is inconclusible
Speech without word and
Word of no speech
Grace to the Mother
For the Garden
Where all love ends.

“The animals have no need for speech, why talk when you are a word.”
Source: Surfacing

“The best speeches are those that hurt your mind, not your ear.”
Examples of self-translation (c. 2004), Quotes - Zitate - Citations - Citazioni

Ashcroft v. Free Speech Coalition, 535 U.S. 234 (2002) (Opinion of the Court).

“A kiss is a lovely trick designed by nature to stop speech when words become superfluous.”
"Webster's Electronic Quotebase," ed. Keith Mohler, 1994