Quotes about ceiling
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Source: De architectura (The Ten Books On Architecture) (~ 15BC), Book II, Chapter IX, Sec. 13

Original Italian text:
Avevamo vegliato tutta la notte — i miei amici ed io — sotto lampade di moschea dalle cupole di ottone traforato, stellate come le nostre anime, perchè come queste irradiate dal chiuso fulgòre di un cuore elettrico. Avevamo lungamente calpestata su opulenti tappeti orientali la nostra atavica accidia, discutendo davanti ai confini estremi della logica ed annerendo molta carta di frenetiche scritture.
Source: 1900's, The Founding and Manifesto of Futurism' 1909, p. 49 Lead paragraph
Madame de Pompadour.

Variant translations: Are you really sure that a floor can't also be a ceiling?
I can't keep from fooling around with our irrefutable certainties. It is, for example, a pleasure knowingly to mix up two and three dimensionalities, flat and spatial, and to make fun of gravity.
1950's, On Being a Graphic Artist', 1953
Context: In my prints I try to show that we live in a beautiful and orderly world and not in a chaos without norms, as we sometimes seem to. My subjects are also often playful. I cannot help mocking all our unwavering certainties. It is, for example, great fun deliberately to confuse two and three dimensions, the plane and space, or to poke fun at gravity. Are you sure that a floor cannot also be a ceiling? Are you absolutely certain that you go up when you walk up a staircase? Can you be definite that it is impossible to eat your cake and have it?

“The Eloquence of Greta Thunberg”, Thomas Gaulkin, https://thebulletin.org/2019/04/greta-thunberg-climate-change-eloquence/ Bulletin of the Atomic Scientists (25 April 2019)
2019, "You did not act in time" (April 2019)

Ta-Nehisi Coates: Joe Biden Shouldn’t Be President, Democracy Now (20 June 2019)

Source: " Pelosi writes to Democrats about Build Back Better https://www.theguardian.com/us-news/live/2021/oct/12/debt-ceiling-deal-latest-biden-pelosi-democrats-us-politics-infrastructure-live?page=with:block-61658bda8f089af1cb01c728#block-61658bda8f089af1cb01c728" (October 12, 2021)

Source: Isaac Herzog (2021) cited in " Israeli president’s pick for military secretary makes history https://www.jns.org/israeli-presidents-pick-for-military-secretary-makes-history/" on Jewish News Syndicate, 21 December 2021.

Source: Educated (2018), Chapter 17, “To Keep it Holy” (p. 157; the reference is to the Holocaust)

They nothing see,
Themselves except, and creatures like themselves,
That liv'd short-sighted, impotent to save.
So on their dissolute spirits, soon or late,
Destruction cometh 'like an armed man,'
Or like a dream of murder in the night,
Withering their mortal faculties, & breaking
The bones of all their pride.
Living Without God In The World (1798)