Lecture on "Electrical Units of Measurement" (3 May 1883), published in Lectures Vol. I, p. 73 https://archive.org/stream/popularlecturesa01kelvuoft#page/73/mode/1up|Popular
“When discussing things with someone, it is best to speak appropriately about whatever the subject may be. No matter how good what you are saying might be, it will dampen the conversation if it is irrelevant.”
Hagakure (c. 1716)
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Tsunetomo Yamamoto 65
Samurai 1659–1719Related quotes
Drinking from the firehose with Howard Bloom https://www.youtube.com/watch?v=vhlL7IjaZNI?t=29m55s
Other
“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
“What good would it be to discuss such a proposition, when force could destroy the best arguments?”
A quoi bon discuter une proposition semblable, quand la force peut détruire les meilleurs arguments.
Part I, ch. X: The Man of the Seas
Twenty Thousand Leagues Under the Sea (1870)
On his mea culpa after making what some interpreted as an anti-Semitic statement in “Reggie Yates: ‘I could get George Clooney to say stuff he’d never said before’” https://www.theguardian.com/tv-and-radio/2019/oct/19/reggie-yates-documentary-maker-interview-i-could-get-george-clooney-to-say-stuff in The Guardian (2019 Oct 19)
Source: Walking on Water: Reflections on Faith and Art
Variant: If you love someone, the greatest gift you can give them is your presence
Source: No Death, No Fear