“Students, when you want to say something, think about it three times before you say it. Speak only if your words will benefit yourselves and others. Do not speak if it brings no benefit.”
VI, 2
Shobogenzo Zuimonki (1238)
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Dogen 34
Japanese Zen buddhist teacher 1200–1253Related quotes
March 29, 1963, page 135.
Official Report of Proceedings of the Hong Kong Legislative Council
Context: I should like to begin with a philosophical comment. I do not think that when one is speaking of hardships or benefits one can reasonably speak in terms of classes or social groups but only in terms of individuals.

“Do not let your deeds belie your words, lest when you speak in church someone may say to himself, "Why do you not practice what you preach?"”
Non confundant opera tua sermonem tuum: ne cum in Ecclesia loqueris, tacitus quilibet respondeat, cur ergo haec quae dicis, ipse non facis?
Letter 52
Letters

“¿Do you think before speaking or do you speak after thinking?”
13 June, 2017
As President, 2017
Source: Telecinco https://www.telecinco.es/informativos/mocion-censura-mariano-rajoy-lapsus-pifias-trabalenguas-pp-partido-popular-presidente-gobierno-espana-podemos-pablo-iglesias_2_2386680191.html

"Say Nothing" (song)
("Say Nothing" on YouTube (with lyrics)) https://www.youtube.com/watch?v=tctb0OHZnqQ
Studio albums, The Evolution of Man (2012)

“Wise men speak when they have something to say, fools speak because they have to say something”