In a debate in the Irish House of Commons on the vote of a grant which was recommended by Sir John Parnell, Chancellor of the Exchequer, as one not likely to be felt burdensome for many years to come, it was observed in reply that the House had no right to load posterity with a debt for what could in no degree operate to their advantage. This quotation was Sir Boyle's response.
[Barrington, Jonah, Personal sketches and recollections of his own times, Chapter XVII https://archive.org/details/personalsketche06barrgoog]
“We are always doing something for Posterity, but I would fain see Posterity do something for us.”
No. 587 (20 August 1714).
The Spectator (1711–1714)
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Joseph Addison 226
politician, writer and playwright 1672–1719Related quotes

Letter to John Dunthorne (29 May 1802), from John Constable's Correspondence, part 2, pp. 31-32
1800s - 1810s

Alternate translation: We go to great pains to alter life for the happiness of our descendants and our descendants will say as usual: things used to be so much better, life today is worse than it used to be.
Мы хлопочем, чтобы изменить жизнь, чтобы потомки были счастливы, а потомки скажут по обыкновению: прежде лучше было, теперешняя жизнь хуже прежней.
Note-Book of Anton Chekhov (1921)
“We see by means of something which illumines us, which we do not see.”
Vemos por algo que nos ilumina; por algo que no vemos.
Voces (1943)

Speech http://hansard.millbanksystems.com/commons/1846/jan/22/address-in-answer-to-the-speech in the House of Commons (22 January 1846).
1840s

“What artists call posterity is the posterity of the work of art.”
Ce qu'on appelle la postérité, c'est la postérité de l'œuvre.
Source: In Search of Lost Time, Remembrance of Things Past (1913-1927), Vol II: Within a Budding Grove (1919), Ch. I: "Madame Swann at Home"

“Posterity always degenerates till it becomes our ancestors.”
As quoted in "The Works of Horace Walpole, Earl of Orford" in The Monthly Review, or, Literary Journal, Vol. 27 (1798) edited by Ralph Griffiths, p. 187